The game is played on an enclosed court, 6.1 m by 12.2 m and 6.1 m high. The back wall is marked by an out of court line, 3.65 m from the ground. Players use a racquet to strike the ball towards the front wall of the court. The ball may make contact with the ceiling, side and/or back walls on the way to the front wall. Play begins with one player serving the ball against the front wall from within the serving zone. The serve must land within the opposing player or team’s service area. When a player is unable to return the ball, either by missing it or letting it bounce more than once, the rally is over. Points are scored only by the serving side by means of a service ace or the winning of a rally. In singles, if the serving player loses a rally, the opposing player gains service. A match consists of a best-of-three the first two games are played to 15 points and the third, if necessary, is played to 11 points.