The ball, along with the racket, is arguably the most important piece of tennis equipment. The tennis ball must lie within the specifications laid down in the Rules of Tennis, while providing consistent playing properties and being sufficiently durable to withstand repeated high-speed impacts with the racket and surface.
Consistency is assured by the inclusion of a tight specification of a variety of physical properties in the Rules of Tennis, which ensures that all of the 200 or so brands approved the ITF are recognisable as tennis balls in appearance and playing characteristics.
For any location and court type, there is a variety of ball available to the player, in addition to the standard (Type 2) ball. A slightly harder, fast-speed ball (Type 1) which is intended for use on ‘slower’ court surfaces, and a larger, slow-speed ball (Type 3) for faster courts are described in the Rules of Tennis, along with a ball that is specifically designed to be used at high altitude.
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