Tennis

Tennis

French singles player Guillaume Rufin serves to Czech player Tomáš Berdych in a tennis match at the 2013 Australian Open
Highest governing body	International Tennis Federation
First played	19th century, Birmingham, England, United Kingdom
Characteristics
Contact	No
Team members	Singles or doubles
Mixed-sex	Yes, separate tours and mixed doubles
Type	Outdoor or indoor
Equipment	Ball, racket, net
Venue	Tennis court
Glossary	Glossary of tennis terms
Presence
Country or region	Worldwide
Olympic	Part of Summer Olympic programme from 1896 to 1924 Demonstration sport in the 1968 and 1984 Summer Olympics Part of Summer Olympic programme since 1988
Paralympic	Part of Summer Paralympic programme since 1992

Tennis is a racket sport that is played either individually against a single opponent (singles) or between two teams of two players each (doubles). Each player uses a tennis racket that is strung with cord to strike a hollow rubber ball covered with felt over or around a net and into the opponent's court. The object of the game is to manoeuvre the ball in such a way that the opponent is not able to play a valid return. The player who is unable to return the ball validly will not gain a point, while the opposite player will.^[1][2]

Tennis is an Olympic sport and is played at all levels of society and at all ages. The sport can be played by anyone who can hold a racket, including wheelchair users. The original forms of tennis developed in France during the late Middle Ages.^[3] The modern form of tennis originated in Birmingham, England, in the late 19th century as lawn tennis.^[4] It had close connections both to various field (lawn) games such as croquet and bowls as well as to the older racket sport today called real tennis.^[5]

The rules of modern tennis have changed little since the 1890s. Two exceptions are that until 1961 the server had to keep one foot on the ground at all times,^[6][7] and the adoption of the tiebreak in the 1970s.^[8] A recent addition to professional tennis has been the adoption of electronic review technology coupled with a point-challenge system, which allows a player to contest the line call of a point, a system known as Hawk-Eye.^[9][10]

Tennis is played by millions of recreational players and is a popular worldwide spectator sport.^[11] The four Grand Slam tournaments (also referred to as the majors) are especially popular: the Australian Open, played on hardcourts; the French Open, played on red clay courts; Wimbledon, played on grass courts; and the US Open, also played on hardcourts.^[12]