Many players face a devastating choice: Should you serve with lots of spin, with the serve going long and allowing the opponent to loop, or should you sacrifice spin, even serving with no spin, so you can keep the serve short? Actually, you can do both. In fact, the spinnier the serve, the easier it is to keep short.
Nearly every coach will tell you to first learn to serve with great spin. Holding back on the spin so you can serve short is a good way to develop a bad habit. When you can get great spin on the ball, then you learn to serve short – but this happens automatically. To get maximum spin, you need to whip the racket into the ball at full speed (using the arm to get the playing hand moving, and snapping the wrist into the ball just before contact) but barely graze the ball. Nearly all of the energy from your arm and wrist goes into spin. When that happens, the ball barely comes off the racket – and so it is easy to keep the ball short. Those who have difficulty serving short with spin are having trouble mostly because they are not grazing the ball finely enough – and so the solution isn’t to serve with less spin; it’s to serve with more spin by grazing the ball more.