| http://www.w3.org/ns/prov#value | - When you hit a tennis forehand with topspin, the topspin on the ball spins away from your opponent ; causing the ball to drop in the court quicker, even when contact is particularly forceful. (Occasionally, for example, when hitting an approach shot, a player can opt to hit with backspin instead of topspin, which is called a slice.)
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