Racquetball is a competitive game in which each player uses a strung racquet to serve and return the ball.

The objective is to win each rally by serving or returning the ball so the opponent is unable to keep the ball in play. A rally is over when a player (or team in doubles) is unable to hit the ball before it touches the floor twice, is unable to return the ball in such a manner that it touches the front wall before it touches the floor, or when a hinder is called.