Hi Nick: I have seen Rafael Nadal and Pete Sampras, among others, turn their shoulders when they toss the ball to serve, so part of their backs face the net. Why do they turn their shoulders like this and should I be doing it?
— Vinay Bomma, Mumbai, India
Hi Vinay: Yes, you should. The more hip and shoulder rotation you are able to generate, the greater disguise and more power you will be able to produce. Think about a golfer or a baseball pitcher: They use their hips and shoulder rotation to generate power. Without hip and shoulder rotation, you will be serving with only your arm.
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