Question: How would I hit a topspin/slice serve?
Answer: Using a Continental grip, brush upward and across the right side of the ball from the ball's center toward what would be 1:30 on a clock face -- for an even mixture of the two spins. Within the topspin-slice type, you can vary the mixture of the two spins, hitting, for example, a 70% topspin - 30% slice, then a 40% topspin - 60% slice. Meet the ball at full extension roughly a foot to your right and a foot farther forward than your head.
See a photo-illustrated, step-by-step lesson here.
See a video-based lesson on the topspin-slice serve here.
