points each, the receiver chooses which side of the court (advantage court or deuce court) the service is to be delivered on the seventh and game-deciding point. Utilized by World Team Tennis professional competition, ATP tours, WTA tours, ITF Pro Doubles and ITF Junior Doubles. Pro set Instead of playing multiple sets, players may play one pro set. A pro set is first to 8 (or 10) games by a margin of two games, instead of first to 6 games. A 12-point tiebreak is usually played when the score is 8–8 (or 10–10). These are often played with no-ad scoring. Match tiebreak This is sometimes played instead of a third set. A match tiebreak (also called super tiebreak) is played like a regular tiebreak, but the winner must win ten points instead of seven. Match tiebreaks are used in the Hopman Cup, Grand Slams (excluding Wimbledon) and the Olympic Games for mixed doubles; on the ATP (since 2006), WTA (since 2007) and ITF (excluding four Grand Slam tournaments and the Davis Cup) tours for doubles and as a player's choice in USTA league play. Fast4 Fast4 is a shortened format that offers a "fast" alternative, with four points, four games and four rules: there are no advantage scores, lets are played, tiebreakers apply at three games all, with it being first to five points with a "sudden death" point at four points all, and the first to four games wins the set. In the event of a no advantage deuce, the receiver gets to choose the service side. If a let occurs, the point continues as normal, and the non-receiver (in a doubles game) is permitted to return the serve. When players swap sides, they are not permitted to sit down and must be ready to play within sixty seconds. Between sets, players are permitted to sit down, and must be ready to play within ninety seconds. Another, however informal, tennis format is called Canadian doubles. This involves three players, with one person playing against a doubles team. The single player gets to utilize the alleys normally reserved only for a doubles team. Conversely, the doubles team does not use the alleys when executing a shot. The scoring is the same as for a regular game. This format is not sanctioned by any official body. "Australian doubles", another informal and unsanctioned form of tennis, is played with similar rules to