Squash games are played to at least 11 points, and the winning player must win by two points. Games can go on indefinitely until one player gains a two-point lead. Matches are won by the first player to win three games (best of five games). A point is scored when a player hits a shot which strikes the front wall of the court and then bounces twice before that player's opponent hits it to the front wall. A point is also scored when a player hits the ball too high (called "out") or too low on the front wall (when it will hit the tin, which rises 18 inches off the floor on the front wall). Every point is started with a serve, which must be hit from one of the small service boxes on either side of the court, must hit the front wall above the service line across the middle of the front wall, and must land in the back quarter of the court on the opposite side from where the serve was hit.