How To Choose Tennis Balls
You will not be able to play tennis correctly if you use old tennis balls. The balls are made up of a pressurized rubber core covered in felt. When this felt becomes worn & smooth, it will not react properly when it is struck by the racquet. The ball will tend to skid when it hits the court.
Balls today are sold in a pressurized sealed plastic can, that helps keep the pressure within the ball, but as soon as the can is opened the balls will start to become stale & flat and will not bounce properly in a couple of days.
During championship games, new balls are opened and played every nine games to ensure the bounce off the balls are as uniform as possible. For practice and ordinary competition, new tennis balls do not need to be used every day, but balls that have been open for a long time, or those that have been used for lots of sets should be avoided because they will not react properly, and using such old balls can have a detrimental effect on players’ timing.
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