A wild card is a tournament or playoff berth awarded to an individual or team that fails to qualify in the normal way; for example, by having a high ranking or winning a qualifying stage. In some events, wildcards are chosen freely by the organizers. Other events have fixed rules. Some North American professional sports leagues compare the records of teams which did not qualify directly by winning a division or conference.

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.