Where the shot goes in tennis is largely determined by that very brief instant that the ball is in contact with the strings. Many pros and players get hooked on the game because of the excitement and feel of a well hit ball. Bill Tilden opened his classic book Match Play and the Spin of the Ball by saying, "There is no sensation in the sporting world so thoroughly enjoyable to me as that when I meet a tennis ball just right in the very middle of my racquet and smack it, just right, where my opponent should be but is not." Unfortunately, most people do not appreciate the intensity and severity of these collisions on the body until there is an injury. High-speed imaging and biomechanical instruments have painted a pretty clear picture of what happens at impact in tennis. First, author illustrates what happens at the moment of impact between a tennis ball and the strings.
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