Defensive skills aren’t practiced enough by most tennis players. According to Paul Annacone, the keys are: depth of shot, and the height of your defensive shots over the net.
PlaySight Tennis Tips with Paul Annacone: Defensive Skills
About the Author: Paul Annacone
Paul Annacone, A former touring professional tennis player and current tennis coach. He is the former coach of open-era leader in Grand Slams Roger Federer, former World No. 1 Pete Sampras, and US Open champion Sloane Stephens. Annacone is currently a coach at ProTennisCoach.com, a commentator at Tennis Channel and works with Taylor Fritz.