What is it?

The Coman Tiebreak Procedure is the same as the present tiebreak (set or match), except that ends are changed after the first point, then after every four points (i.e., after the 5th, 9th, 13th, 17th points, etc.), and at the conclusion of the tiebreak. The scoring in the Coman Tiebreak Procedure is the same as a traditional set or match tiebreak, and the procedure for playing the Coman Tiebreak is the same as a set or match tiebreak. For example, if the Coman Tiebreak Procedure is used when the set score is 6-6, the player whose turn it is to serve shall serve the first point from the deuce court; after the first point, the players shall change ends and the following two points shall be served by the opponent(s) (in doubles, the player of the opposing team due to serve next), starting with the ad court; after this, each player/team shall serve alternately for two consecutive points (starting with the ad court), changing ends after every four points, until the end of the tiebreak game.