About

Regardless of how this stroke is played, the player simply has to rub the ball from the bottom up. To be effective, this stroke is generally performed with the forearm in a forehand, and with the wrist in the back. Why are these short segments rather than the shoulder or the arm? Because this shot requires incredible finesse, associated with great speed. Producing spin is only possible with a very fine touch and intense acceleration just before contact with the ball.