Hitting a topspin Serve

As your racquet accelerates up to the ball, your shoulders should uncoil (righties will rotate counterclockwise; lefties will rotate clockwise), transferring energy from your legs and trunk to your arm. To generate topspin, imagine that the back of the ball is a clock and brush up on it from 7 to 1 o’clock if you’re a righty or 5 to 11 o’clock if you’re a lefty.