Grand Slam (tennis) facts for kids

The Grand Slam in tennis is the achievement of winning all four major championships in one discipline in a calendar year. In doubles, a Grand Slam may be achieved as a team or as an individual with different partners. Winning all four major championships consecutively but not within the same calendar year is referred to as a "non-calendar-year Grand Slam", while winning the four majors at any point during the course of a career is known as a "Career Grand Slam".

The term Grand Slam is sometimes attributed to the Grand Slam tournaments, also referred to as Majors, and they are the world's four most important annual professional tennis tournaments. They offer the most ranking points, prize money, public and media attention, the greatest strength and size of the field and, in recent years, the longest matches for men (best of five sets, best of three for the women). The tournaments are overseen by the International Tennis Federation (ITF), rather than the separate men's and women's tour organizing bodies, the Association of Tennis Professionals (ATP) and Women's Tennis Association (WTA), but both the ATP and WTA award ranking points based on players' performances in them.

The four Grand Slam tournaments are the Australian Open in January, the French Open from late May to early June, Wimbledon in late June to early July, and the US Open in late August to early September, with each played over two weeks. The Australian and the United States tournaments are played on hard courts, the French on clay, and Wimbledon on grass. Wimbledon is the oldest tournament, founded in 1877, followed by the US in 1881, the French in 1891 (major in 1925), and the Australian in 1905, but it was not until 1925 that all four were held as officially sanctioned majors.

History

With the growing popularity of tennis, and with the hopes of unifying the sport's rules internationally, the British and French tennis associations started discussions at their Davis Cup tie, and in October 1912 organized a meeting in Paris, joined by the Australasian, Austrian, Belgian, Spanish, and Swiss associations. They subsequently formed the International Lawn Tennis Federation (ILTF), holding their first meeting in 1913, joined by the Danish, German, Dutch, Russian, South African, and Swedish organizations. Voting rights were divided based on the perceived importance of the individual countries, with Great Britain's Lawn Tennis Association (LTA) receiving the maximum six votes. Three tournaments were established, being designated as "World Championships":

• World Grass Court Championships, played on grass courts.
• World Hard Court Championships, played on clay courts.
• World Covered Court Championships, played on an indoor wood surface.

The LTA was given the perpetual right to organize the World Grass Court Championships, to be held at Wimbledon, and France received permission to stage the World Hard Court Championships until 1916. Anthony Wilding of New Zealand won all three of these World Championships in 1913.

The United States National Lawn Tennis Association (USNLTA) expressed disagreement over the power distribution within the ILTF and the designation of "World Championship" status to the British and French tournaments, and thus initially refused to join the Federation, choosing instead to be bystanders to their meetings. By the 1920s, with the World Covered Court Championships failing to attract top players and the growing success of American and Australian tennis, the ILTF worked to convince the USNLTA to join them, meeting their demand to drop the designation of "World Championships" from all three tournaments in March 1923, which led to the demise of both the World Covered Court Championships and the World Hard Court Championships. A new category of "Official Championships" was created for the national championships of Britain, France, Australia, and the US. By the 1930s, these four tournaments had become well defined as the most prestigious in the sport.

In 1933, Jack Crawford won the Australian, French, and Wimbledon Championships, leaving him just needing to win the last major event of the year, the U.S. Championships, to become the reigning champion of all four major tournaments, a feat described as "a grand slam" by sports columnist Alan J. Gould of The Reading Eagle, and later that year by John Kieran of The New York Times, who stated that if Crawford won at Forest Hills it "would be something like scoring a grand slam on the courts, doubled and vulnerable." The term 'Grand Slam' originates from the card game contract bridge, where it is used for winning all possible tricks. In golf it was used for the first time to describe a total of four wins, specifically Bobby Jones' achievement of winning the four major golf tournaments of the era, which he accomplished in 1930. "Grand Slam" or "Slam" has since also become used to refer to the tournaments individually. The first player to win all four majors in a calendar year and thus complete a Grand Slam was Don Budge in 1938.

At the time, only amateur players were allowed to participate in the Grand Slam and other ILTF-sanctioned tournaments. Amateur standing, regulated by the ILTF alongside its associated national federations, forbade players from receiving prize money, earning pay by teaching tennis, being contracted by promoters and playing paid exhibition matches, though expense payments were allowed along with certain monies from sporting goods companies or other benefactors. Amateurs who "defected" to become professional were banned from competing in amateur tournaments and dropped from their national associations. The first major professional tour was established in 1926 by promoter C. C. Pyle with a troupe of American and French players, most notably Suzanne Lenglen, playing exhibition matches to paying audiences. Over the next decades many other head-to-head tours were run and professional tournaments established, with three, the U.S. Pro Tennis Championships, French Pro Championship and Wembley Championships, standing out, and considered to have been the professional majors. By the 1950s, largely due to efforts of player/promoter Jack Kramer, this lucrative parallel circuit was luring in most of the star amateurs on the men's side, much to the ire of the ILTF and organizers of the Grand Slam tournaments. It was an open secret that the top players who remained as amateurs were receiving undeclared under-the-table payments from tournament promoters, an arrangement tolerated by their national tennis associations to dissuade them from joining the pro ranks and secure their availability for the majors and Davis Cup. This system was derisively referred to as 'shamateurism' that was seen as undermining the integrity of the sport. Ramanathan Krishnan and Roy Emerson, for example declined large contract offers from the professional promoters, with the latter stating that he was better paid in the amateur circuit.

Tensions over this status quo, which had been building for decades, finally came to a head in 1967. The first tournament open to professional tennis players played on Centre Court at Wimbledon, the Wimbledon Pro, was staged by the All England Lawn Tennis Club in August, offering a prize fund of US$45,000. The tournament was deemed very successful, with packed crowds and the play seen as being of higher quality than the amateur-only Wimbledon final held two weeks earlier. This success in combination with large signings of top players to two new professional tours—World Championship Tennis and the National Tennis League—convinced the LTA on the need for open tennis. After a British proposal for this at the annual ILTF meeting was voted down, the LTA revolted, and in its own annual meeting in December it voted overwhelmingly to admit players of all statuses to the 1968 Wimbledon Championships and other future tournaments in Britain, "come hell or high water". The eventual backing of the USNLTA that came after a February 1968 vote forced the ILTF to yield and allow each nation to determine its own legislation regarding amateur and professional players, which it voted for in a special meeting in March 1968. This marked the start of the Open Era of tennis, with its first tournament, the 1968 British Hard Court Championships, beginning three weeks later on 22 April in Bournemouth, England, while the first open Grand Slam tournament, the 1968 French Open, was held in May.

Even after the advent of the Open Era, players including John McEnroe and Chris Evert have pointed out that skipping the Australian Open was the norm because of the travelling distance involved and the inconvenient dates close to Christmas and New Year. There were also the contracted professional players who had to skip some major events like the French Open in the 1970s because they were committed to the more profitable pro circuits. In one case, Australian players including Rod Laver, Ken Rosewall and Roy Emerson who had contracts with George MacCall's National Tennis League were prevented from participating in the 1970 Australian Open because the financial guarantees were deemed insufficient.

Although it has been possible to complete a Grand Slam in most years and most disciplines since 1925, it was not possible from 1940 to 1945 because of interruptions at Wimbledon, the Australian and French Championships due to World War II, the years from 1970 to 1985 when there was no Australian tournament in mixed doubles, 1986 when there was no Australian Open, and 2020 when Wimbledon was cancelled due to the COVID-19 pandemic.

Tournaments

The Grand Slam of tennis comprises these four major tournaments:

Australian Open

Rod Laver Arena, Melbourne Park.

The Australian Open is the first Grand Slam tournament of the year, played annually in late January and early February. The inaugural edition took place in November 1905 on the grass courts of the Warehouseman's Cricket Ground in Melbourne, Australia. It was held as the Australasian Championships until 1927 and thereafter as the Australian Championships until the onset of the Open Era in 1969, passing through various venues in Australia and New Zealand before settling at the Kooyong Lawn Tennis Club in Melbourne between 1972 and 1987. Since 1988, it has been played on the hard courts of the Melbourne Park sports complex, which currently uses GreenSet as its court manufacturer.

Managed by Tennis Australia, formerly the Lawn Tennis Association of Australia (LTAA), the tournament struggled until the mid-1980s to attract the top international players due to its distance from Europe and America and proximity to the Christmas and holiday season, but it has since grown to become one of the biggest sporting events in the Southern Hemisphere and the highest attended Grand Slam tournament, with more than 1,020,000 people attending the 2024 edition. Nicknamed the "Happy Slam" and billed as "the Grand Slam of Asia/Pacific", it has become known for its modernity and innovation, being the first Grand Slam tournament to feature indoor play and install retractable roofs on its main courts, the first to schedule night-time men's singles finals, and the first to substitute electronic line calling for line judges, using an expanded version of the Hawk-Eye technology known as "Hawk-Eye Live".

The tournament was designated a major championship by the International Lawn Tennis Federation in 1923. Nowadays, its draws host 256 singles players, 128 doubles teams and 32 mixed doubles teams, with the total prize money for the 2024 tournament being A$86,500,000.

French Open

Court Philippe Chatrier, Stade Roland Garros.

The French Open, also known as Roland Garros, is the second Grand Slam tournament of the year, played annually in late May and early June. A French championships closed event (restricted to members of French clubs) was first held in 1891 on the sand courts of the Societé de Sport de Île de Puteaux, in Puteaux, Île-de-France, and changed venues over the years. In 1925 the French championships became open to all amateurs and since 1928 has been held on clay courts at the Stade Roland-Garros in Paris, France. Both the venue and the tournament are named "Roland Garros" after the pioneering French aviator.

Organized by the Fédération française de tennis (FFT), formerly known as the Fédération Française de Lawn Tennis until 1976, the French Open is the only Grand Slam tournament played on a red clay surface. It is generally considered to be the most physically demanding tennis tournament in the world.

The World Hard Court Championships was considered the premier clay championship in France from 1912–1923 (apart from one year held in Belgium) as it admitted international competitors, and it is therefore often seen as the true precursor to the French Open before 1925. The French championships was first held as an International Lawn Tennis Federation–sanctioned major championship in 1925.

Today, it has draws that host 256 singles players, 128 doubles teams and 32 mixed doubles teams, with the total prize money for the 2024 tournament being €53,478,000. The 2018 edition saw a record attendance of 480,575 spectators.

Wimbledon

Centre Court, All England Lawn Tennis and Croquet Club.

The Wimbledon Championships, commonly known as Wimbledon, is the third Grand Slam tournament of the year, played annually in late June and early July. It was first held in 1877 at the All England Lawn Tennis and Croquet Club, at the time located off Nursery Road in Wimbledon, London, England. The tournament has always been contested at this club, which moved to its present site off Church Road in 1922 in order to increase its attendance capacity.

Wimbledon is organized by a committee of management consisting of nineteen members, with twelve being club members and the remaining seven nominated by the Lawn Tennis Association (LTA). As the world's oldest tennis event, it is widely regarded as the most prestigious tennis tournament, and it is known for its commitment to longstanding traditions and guidelines. It is one of few tournaments and the only Grand Slam event that is still played on grass courts, tennis's original surface, and where "lawn tennis" originated in the 1800s. Players are required to wear all-white attire during matches, and they are referred to as "Gentlemen" and "Ladies". There is also a tradition where the players are asked to bow or curtsy towards the Royal Box upon entering or leaving Centre Court when either the Prince of Wales or the monarch are present.

The tournament was given the title "World Grass Court Championships" by the International Lawn Tennis Federation between 1912 and 1923, and was designated a major championship following the abolition of the three ILTF World Championships. Since 1937, the BBC has broadcast the tournament on television in the United Kingdom, with the finals shown live and in full on television in the country each year. The BBC's broadcast of the 1967 edition was among the first colour television broadcasts in the UK.

Today, the event has draws that host 256 singles players, 128 doubles teams and 32 mixed doubles teams, with the total prize money for the 2021 tournament being £35,016,000, and 500,397 people attending the 2019 edition. The tournament has some of the longest running sponsorships in sports history, having been associated with Slazenger since 1902, and with the Robinsons fruit drink brand since 1935.

US Open

Arthur Ashe Stadium, USTA Billie Jean King National Tennis Center.

The US Open is the fourth and final Grand Slam tournament of the year, played annually in late August and early September. It was first held in August 1881 on grass courts at the Newport Casino in Newport, Rhode Island, United States. The tournament changed venues in its early years, with each discipline continuing to be held separately at various venues until 1923, when the tournament settled at the West Side Tennis Club in Forest Hills, Queens, New York City. In 1978, it moved to the hardcourts of the USTA Billie Jean King National Tennis Center in Flushing Meadows, Queens, where it has been contested ever since.

Organized by the United States Tennis Association (USTA), previously known as the United States National Lawn Tennis Association (USNLTA) until 1920, and as United States National Lawn Tennis Association (USLTA) until 1975, it is the only Grand Slam tournament to have been played every year since its inception. In 1997, Arthur Ashe Stadium, the largest tennis stadium in the world with a capacity of 23,771 spectators, was opened. It is named after Arthur Ashe, the winner of the 1968 tournament—the first in which professionals were allowed to compete.

Over the years, the tournament has pioneered changes that other tournaments later adopted, including the introduction of a tiebreak system to decide the outcome of sets tied at 6–6 in 1970, being the first Grand Slam tournament to award equal prize money to the men's and women's events in 1975, the installation of floodlights in 1975 in order to allow matches to be played at night, and the introduction of instant replay reviews of line calls using the Hawk-Eye computer system in 2006.

The ILTF officially designated it as a major tournament in 1923. Today, the event has draws that host 256 singles players, 128 doubles teams and 32 mixed doubles teams, with the total prize money for the 2020 tournament being US$53,400,000, and a US television viewership of 700,000. Since 2004, the tournament has been preceded by the US Open Series, composed of North American hardcourt professional tournaments that lead up to and culminate with the US Open itself. The season is organized by the USTA as a way to focus more attention on American tennis tournaments by getting more of them on domestic television.

Grand Slam

A Grand Slam (sometimes called a Calendar-year Grand Slam, Calendar Grand Slam, or Calendar Slam) is the achievement of winning the Australian Open, French Open, Wimbledon, and US Open in the same year. Margaret Court is the only player to complete a Grand Slam in two disciplines, singles and mixed doubles (twice), while wheelchair players Diede de Groot and Dylan Alcott have completed one in both the singles and doubles disciplines of their respective classes.

The following is a list of players that achieved it.

• 

  Don Budge, men's singles in 1938.

• 

  Maureen Connolly, women's singles in 1953.

• 

  Rod Laver, men's singles in 1962 and 1969.

• 

  Margaret Court, women's singles in 1970.

• 

  Steffi Graf, women's singles in 1988.

List of Grand Slam and related tennis records

• Grand Slam sourcing.

Current champions

Each entry has an asterisk (*) linking to the tournament of that year.

Event		Australian Open	French Open	Wimbledon	US Open
		2024	2024	2024	2023
Singles	Men	Jannik Sinner*	Carlos Alcaraz*	Carlos Alcaraz*	Novak Djokovic*
	Women	Aryna Sabalenka*	Iga Świątek*	Barbora Krejčíková*	Aryna Sabalenka*
Doubles	Men	Rohan Bopanna* Matthew Ebden	Marcelo Arévalo* Mate Pavić	Harri Heliövaara* Henry Patten	Joe Salisbury* Rajeev Ram
	Women	Hsieh Su-wei* Elise Mertens	Coco Gauff* Kateřina Siniaková	Kateřina Siniaková* Taylor Townsend	Gabriela Dabrowski* Erin Routliffe
	Mixed	Hsieh Su-wei* Jan Zieliński	Laura Siegemund* Édouard Roger-Vasselin	Hsieh Su-wei* Jan Zieliński	Anna Danilina* Harri Heliövaara
Wheelchair singles	Men	Tokito Oda*	Tokito Oda*	Alfie Hewett*	Alfie Hewett*
	Women	Diede de Groot*	Diede de Groot*	Diede de Groot*	Diede de Groot*
	Quad	Sam Schröder*	Guy Sasson*	Niels Vink*	Sam Schröder*
Wheelchair doubles	Men	Alfie Hewett* Gordon Reid	Alfie Hewett* Gordon Reid	Alfie Hewett* Gordon Reid	Stéphane Houdet* Takashi Sanada
	Women	Diede de Groot* Jiske Griffioen	Diede de Groot* Aniek van Koot	Yui Kamiji* Kgothatso Montjane	Yui Kamiji* Kgothatso Montjane
	Quad	Andy Lapthorne* David Wagner	Sam Schröder* Niels Vink	Sam Schröder* Niels Vink	Sam Schröder* Niels Vink
Junior singles	Boys	Rei Sakamoto*	Kaylan Bigun*	Nicolai Budkov Kjær*	João Fonseca*
	Girls	Renáta Jamrichová*	Tereza Valentová*	Renáta Jamrichová*	Katherine Hui*
Junior doubles	Boys	Maxwell Exsted* Cooper Woestendick	Nicolai Budkov Kjær* Joel Schwärzler	Alexander Razeghi* Max Schönhaus	Max Dahlin* Oliver Ojakaar
	Girls	Tyra Caterina Grant* Iva Jovic	Renáta Jamrichová* Tereza Valentová	Tyra Caterina Grant* Iva Jovic	Mara Gae* Anastasiia Gureva

Former champions

Per discipline

Singles finals

• Men
• Women

Related concepts

Non-calendar-year Grand Slam

In 1982, the International Tennis Federation (ITF) began offering a $1 million bonus to any singles player to win the four majors consecutively regardless the tournaments order of winning them while the Men's International Professional Tennis Council, which was the governing body of men's professional tennis at the time, stated that 'Grand Slam' need not necessarily be won in the same year. This revision by the Council and reportedly the ITF was approved by the representatives of the four Grand Slam tournaments at Wimbledon. Neil Amdur and Allison Danzig of the New York Times both criticised the changed definition of the term Grand Slam, whereas in 1985 Hal Bock of Associated Press backed the change. Despite newspaper reports claiming that ITF President Philippe Chatrier had said "the four big events no longer have to be won in the same calendar year for a player to be recognized as Grand Slam champion", ITF General Secretary David Gray in a 1983 letter claimed that it was never the intention of ITF to alter anything regarding the definition of the classic Grand Slam:

There seems to be some confusion. The ITF's only initiative in this matter has been the organisation of the offer of a bonus of $1 million to any player who holds all four Grand Slam titles simultaneously ... Despite all that we have read on this matter, it has never been my Committee of Management's intention to alter the basis of the classic Grand Slam i.e., the capture of all four titles in a year.

When Martina Navratilova won the 1984 French Open and became the reigning champion of all four women's singles discipline, she was the first player to receive the bonus prize in recognition of her achievement. Some media outlets said that she had won a Grand Slam. Curry Kirkpatrick of Sports Illustrated wrote "Whether the Slam was Grand or Bland or a commercial sham tainted with an asterisk the size of a tennis ball, Martina Navratilova finally did it."

When Rafael Nadal was on the verge of completing a non-calendar-year Grand Slam at the 2011 Australian Open, one writer observed, "Most traditionalists insist that the 'Grand Slam' should refer only to winning all four titles in a calendar year, although the constitution of the International Tennis Federation, the sports governing body, spells out that 'players who hold all four of these titles at the same time achieve the Grand Slam'." In 2012 the ambiguity was resolved, with the ITF's current constitution stating "The Grand Slam titles are the championships of Australia, France, the United States of America and Wimbledon. Players who hold all four of these titles in one calendar year achieve the 'Grand Slam'."

Combining the Grand Slam and the non-calendar-year Grand Slam, only eight singles players on 11 occasions achieved the feat of being the reigning champion of all four majors, three men (Don Budge, Rod Laver, Novak Djokovic) and five women (Maureen Connolly, Margaret Court, Martina Navratilova, Steffi Graf, Serena Williams).

The following list is for those players who achieved a non-calendar-year Grand Slam by holding the four major titles at the same time but not in the calendar year. Players who completed a Grand Slam within the same streak as a non-calendar-year Grand Slam are not included here.

• 

  Martina Navratilova completed the feat in singles in 1984.

• 

  Steffi Graf completed the feat in singles in 1994.

• 

  Serena Williams completed the feat in singles in 2003, 2015.

• 

  Novak Djokovic completed the feat in singles in 2016.

List of Grand Slam and related tennis records

Career Grand Slam

The career achievement of winning all four major championships in one discipline is termed a "Career Grand Slam", or "Career Slam". In singles, eight men (Fred Perry, Don Budge, Roy Emerson, Rod Laver, Andre Agassi, Roger Federer, Rafael Nadal, and Novak Djokovic) and ten women (Maureen Connolly, Doris Hart, Shirley Fry Irvin, Margaret Court, Billie Jean King, Chris Evert, Martina Navratilova, Steffi Graf, Serena Williams, and Maria Sharapova) have completed a Career Grand Slam. Four men (Emerson, Laver, Djokovic, and Nadal) and five women (Court, Evert, Navratilova, Graf, Williams) have achieved the feat more than once over the course of their careers.

Only six players have completed a Career Grand Slam in both singles and doubles: one male (Roy Emerson) and five females (Margaret Court, Doris Hart, Shirley Fry Irvin, Martina Navratilova, and Serena Williams).

Boxed Set

A "Boxed Set" refers to winning one of every possible major title in the singles, doubles, and mixed doubles disciplines throughout a player's career. Only three players have completed a Boxed Set, all females: Doris Hart, Margaret Court, and Martina Navratilova. Court's second Boxed Set, completed in 1969, spans the Amateur and Open Eras, but she later completed a set entirely within the Open Era in 1973.

• The event at which the Boxed Set was completed indicated in bold.

S Singles D Doubles X Mixed doubles

Boxed Sets	Player	Age	Australian Open			French Open			Wimbledon			US Open
			S	D	X	S	D	X	S	D	X	S	D	X
2	Margaret Court	21	1960	1961	1963	1962	1964	1963	1963	1964	1963	1962	1963	1961
		26	1961	1962	1964	1964	1965	1964	1965	1969	1965	1965	1968	1962
1	Doris Hart	29	1949	1950	1949	1950	1948	1951	1951	1947	1951	1954	1951	1951
1	Martina Navratilova	46	1981	1980	2003	1982	1975	1974	1978	1976	1985	1983	1977	1985

Golden Slam

The term "Golden Slam" (also known as "Golden Grand Slam", "Calendar-year Golden Slam" or "Calendar Golden Slam") refers to the achievement of winning all four majors and the Olympic or Paralympic gold medal in a calendar year. The achievement was first established in 1988, when Steffi Graf won all the aforementioned titles in singles. She is currently the only singles able-bodied player to achieve it, while Diede de Groot and Dylan Alcott also accomplished the feat, in wheelchair singles and wheelchair quad singles respectively.

• Non-calendar-year Golden Slam: refers to the achievement of winning all four majors and the Olympic or Paralympic gold medal consecutively across two calendar years. It has been used since 2013, when Bob and Mike Bryan won the aforementioned titles consecutively in doubles between 2012 and 2013. Their achievement was also dubbed the "Golden Bryan Slam".

• Career Golden Slam: refers to the achievement of winning all four majors and the Olympic or Paralympic gold medal during their career.

Other concepts

• Super Slam: Combination of the Golden Slam and year-end championship title (ATP Finals for the men's tour, WTA Finals for the women's tour, and the Wheelchair Tennis Masters for the wheelchair tennis tour) in a calendar year, also known as "Calendar-year Super Slam" or "Calendar Super Slam". Diede de Groot is currently the only player to do so, in women's wheelchair singles in 2021.
• Non-calendar-year Super Slam: refers to the achievement of winning all four majors, the Olympic or Paralympic gold medal, and the year-end championship consecutively across two calendar years. Steffi Graf is currently the only one to achieve it, with her Golden Slam in 1988 following her victory at the year-end championship in 1987.
• Career Super Slam: refers to the achievement of winning all four majors, the Olympic or Paralympic gold medal, and the year-end championship throughout a career.

• Three-Quarter Slam: refers to the achievement of winning three of the four majors in a calendar year, missing out on the Grand Slam by only one title.

• Surface Slam: refers to the achievement of winning a major title on each of three current surfaces (clay, grass and hard courts) in a calendar year. It's been possible since 1978, when the US Open changed its playing surface from clay to hard courts. From 1978 to 1987, the Australian Open and Wimbledon were played on grass, the French Open on clay and the US Open on hard, but since 1988 the Australian Open has also been played on hard courts.

• Channel Slam: refers to the achievement of winning both the French Open and Wimbledon in a calendar year. The name makes reference to the English Channel, the body of water separating France from the United Kingdom, the host countries of the French Open and Wimbledon. These tournaments are held clay and grass courts, respectively, surfaces very different from each other, usually being held a few weeks from each other, meaning that players who have deep runs in the French Open have little time to adapt to the different surface conditions found at Wimbledon.

Pro Slam

Before the start of the Open Era in 1968, only amateur players were allowed to compete in the four Grand Slam tournaments. Many male top players "went pro" in order to win prize money legally, competing on a professional world tour comprising completely separate events. From 1927 to 1967, the three tournaments considered by many to have been the "majors" of the professional tour were:

• U.S. Pro Tennis Championships,
• French Pro Championship,
• Wembley Championships.

A player who won all three in a calendar year was considered retrospectively to have achieved a "Professional Grand Slam", or "Pro Slam". In the pre-open era the terms did not exist. The feat was accomplished by Ken Rosewall in 1963 and Rod Laver in 1967, while Ellsworth Vines, Hans Nüsslein and Don Budge have won the three major trophies during their careers. The professional majors did not have a women's draw.

See also

In Spanish: Grand Slam (tenis) para niños

• List of Grand Slam–related tennis records
• Lists of tennis records and statistics
• Grand Slam (golf)