Originally Posted by
Goat Milk
San Francisco tennis researcher John Yandell used a high-speed video camera and special software to count the average number of revolutions of a tennis ball hit full force by Nadal. “The first guys we did were Sampras and Agassi. They were hitting forehands that in general were spinning about 1,800 to 1,900 revolutions per minute. Federer is hitting with an amazing amount of spin, too, right? 2,700 revolutions per minute. Well, we measured one forehand Nadal hit at 4,900.
Sick spin on the ball particularly on his forehand and he's able to get the ball up so high only players like Fed can beat him when he perfects that because only fed can hit a winner hitting a forehand above his shoulder.