A match consists of the best of any odd numbers of games, each game being won by the player who first reaches 11 points or who, after 10 points each, wins two clear points ahead. A point is scored when the server fails to make a good service, when either player fails to make a good return, or when either player commits a specified infraction (e.g., touches the playing surface with a free hand while the ball is in play). Service changes hands after every two points until 10-all is reached, when it changes after every subsequent point.