Ball Type 2 are the same balls currently being used. These will be used for medium pace courts such as the U.S. Open. These balls will be identical to the present balls except they will be 7 to 8 percent larger in diameter. It is hoped that the larger balls will slow down the game due to their greater air resistance and a higher bounce angle. These balls could also solve the problem of the high altitude ball situation.
Recreational players can use any one of the three balls on any surface they choose.
Some club players may want to play with the larger ball to have longer rallies. For sanctioned events it will be up to the tournament or league director to decide which ball will be used. Some teaching pros may elect to use the larger ball for beginners and low-level players. The ITF is looking to slow down the professional game, mainly in the men's fast court events, to make it more appealing to the spectators and to possibly speed up the clay-court matches. This extra time is the same extra time that the player would get in switching from a grass court to a hard court.