The Qlipp sensor attaches to your racket and is capable of tracking forehand and backhand swings -- and predicting the speed of your hits. Aloysius Low is a Senior Editor at CNET covering mobile ...

Rafael Nadal’s forehand is a rare combination of speed and tremendous topspin, making it one of the most lethal weapons in tennis.

The ability to quantify the physical aspects of a tennis swing—no matter the type of stroke—with actual data gives players and coaches a completely new tool. Offering up that data in real-time ...