John Isner Serve Analysis
By Your Host • Feb 13th, 2008 • Category: Improve your ServeLike Ivanisevic two decades ago, Isner has served his way into the spotlight. Here’s what you can learn from two of the most potent deliveries tennis has ever seen. 1. TOSSING ARM Today you see most pros lift their tossing arms fi rst rather than both arms together. That’s a big change from the past [...]