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|Ancient Greek Olympics|
As the tennis ball pitches on the ground the felt covering is compressed first and then the synthetic material beneath the felt. Both the phenomena ultimately absorb much force of impact. One of the important laws of tennis stipulates that the ball released from the height of 100 inches above the court should not bounce higher than 58 inches. This law is meant to ensure that the bounce of the ball is controlled. Another important purpose served by the furry felt is reduction in the speed of the ball through friction with the air in order to give some more time (even if it is friction of a second) to the player to return fiery service or to hit a volley. One more advantage of felt covering: It is the fibrous surface of the ball that prevents it from slipping on the catgut cord of the racket even if it is hit from the slanting angle. On the other hand playing with a fiber-less smooth ball the players find it difficult to judge where the ball will pitch.