Tennis is a racket sport played between two opposing players (singles) or pairs (doubles). Players use a strung racket to hit a felt-covered rubber ball over a net and into the opponent's court. The goal is to strategically place the ball so the opponent cannot make a valid return. Failure to return the ball successfully results in a point for the opposing player or team.
Naomi Osaka's eye-catching 'Eiffel Tower' inspired outfit at the French Open has sparked conversation, defying critics with her couture tennis fashion in Paris.
The Davis Cup, an annual competition between men's national tennis teams, was established in 1900.
The Australian Open, one of the four Grand Slam tournaments, dates back to 1905.
In 1913, the International Lawn Tennis Federation (ILTF), now known as the International Tennis Federation (ITF), was founded and established three official tournaments as the major championships of the day.
From 1920 to 1930, Bill Tilden won singles titles at Wimbledon three times and the US Championships seven times.
In 1924, tennis was withdrawn from the Olympic Games after the 1924 Games.
In 1925, the French Championships, which had been restricted to members of French clubs since 1891, were opened to international tennis players.
In 1926, promoter C. C. Pyle established the first professional tennis tour, featuring American and French tennis players in exhibition matches for paying audiences.
From 1920 to 1930, Bill Tilden won singles titles at Wimbledon three times and the US Championships seven times.
In 1937 and 1938, Donald Budge won six consecutive major titles.
In 1938, Donald Budge became the first person to win all four major singles titles during the same calendar year, the Grand Slam.
In 1950, an Associated Press poll named Bill Tilden as the greatest player of the first half of the 20th century.
In 1954, Van Alen founded the International Tennis Hall of Fame, a nonprofit museum in Newport, Rhode Island.
Prior to 1961, a tennis server was required to keep one foot on the ground at all times during their service motion. This rule was changed in 1961, relaxing the restriction on foot placement during service.
In 1962, Rod Laver became the only male player in history to have won the calendar year Grand Slam twice.
In 1963, the Fed Cup, the analogous competition for women's national teams, was founded as the Federation Cup.
In 1967, Rod Laver became the only male player in history to have won the calendar year Professional Grand Slam.
In 1968, commercial pressures led to the abandonment of the distinction between amateur and professional players, inaugurating the Open Era, allowing all players to compete in all tournaments.
In 1969, Rod Laver became the only male player in history to have won the calendar year Grand Slam twice.
In his 1979 autobiography, Jack Kramer said that, based on consistent play, Budge was the greatest player ever.
Tennis returned to the Olympics as a 21-and-under demonstration event in 1984.
Andre Agassi chose to skip Wimbledon from 1988 through 1990, citing the event's traditionalism, particularly its "predominantly white" dress code.
In 1988, tennis was reintroduced as a Summer Olympic Games sport, marking its consistent return to the Olympic program.
In 1988, tennis was reintroduced as a full-medal sport at the Seoul Olympics after the success as a demonstration sport in 1984.
Andre Agassi chose to skip Wimbledon from 1988 through 1990, citing the event's traditionalism, particularly its "predominantly white" dress code.
In 1990, when the ATP began running the men's tour, the directors designated the top nine tournaments, outside of the Grand Slam events, as "Super 9" events.
In 1997, the maximum length of a tennis racket frame was shortened from 32 inches (81 cm) to 29 inches (74 cm).
In December 1999, Steffi Graf was named the greatest female tennis player of the 20th century by a panel of experts assembled by the Associated Press.
For the 2000 Olympics, Lisa Raymond was passed over for Team USA in favor of Serena Williams by captain Billie Jean King, even though Raymond was the top-ranked doubles player in the world at the time, and Raymond unsuccessfully challenged the selection.
In 2000 the "Super 9" events became the Tennis Masters Series.
In 2004 the Tennis Masters Series became the ATP Masters Series.
In 2004, the ITF implemented a new rankings scheme to encourage greater participation in doubles, by combining two rankings (singles and doubles) into one combined tally.
In 2006, Billie Jean King called Martina Navratilova the greatest singles, doubles, and mixed doubles player who's ever lived.
In August 2007, the ATP announced major changes to the tour that were introduced in 2009.
In 2007, the Australian Open and Wimbledon introduced the Hawk-Eye system for challenging line calls during matches.
In June 2008, the Bleacher Report ranked Martina Navratilova as the top female tennis player of all time.
In 2009, on-court coaching was introduced in women's tennis for WTA Tour events, allowing players to request their coach once per set.
In 2009, the ATP Masters Series was renamed to the "ATP Masters 1000", with the number referring to the ranking points earned by the winner of each tournament.
In July 2010, Sportswriter John Wertheim of Sports Illustrated stated that Serena Williams is the greatest female tennis player ever.
As of 2011, six of the nine "1000" level tournaments are combined ATP and WTA events.
In March 2012, the Tennis Channel published a combined list of the 100 greatest men and women tennis players of all time, ranking Steffi Graf as the greatest female player (in 3rd place overall).
In 2012, the Dubai Tennis Championships offered total prize money of US$2,313,975, marking it as a tournament with a significant financial incentive for players.
In November 2018, Tennis.com polled its readers to choose the greatest women's tennis player of all time, and Graf came in first.
As of 2018, at the US Open, the singles competition received the most prize money (US$40,912,000), accounting for 80.9% of total player base compensation, followed by doubles (US$6,140,840), singles qualifying (US$3,008,000), and mixed doubles (US$505,000).
In 2018, a Tennis.com panel selected Serena Williams as the greatest female tennis player in the Open Era.
In May 2020, the Tennis Channel ranked Serena Williams as the greatest female tennis player of all time.
In July 2020, The Guardian polled its readers to determine the greatest female tennis player of the past 50 years, and Graf was the clear favorite.
In 2021, the WTA rebranded, resembling the men's tournament series.
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