The backhand topspin is inarguably the most elegant and effective shot in tennis, mastered by the likes of Federer, Henin, Mauresmo, Kuerten and the legendary Pete Sampras. Artistry and grace aside, it is a potent weapon enabling it's wielder with the widest range of spin and depth. Ask Federer, and he'll show you how to flick your wrist at an acute cross-court angle and send your opponent scrambling into the stands, or slam your shoulder down the line and watch the ball scream through the chalk.