I was playing a game the other day, and someone pointed out to me after the match that my serve was a fault. He said that I cannot stop my swing once I start my serve. He claims that I stop just to throw off the opponent. I admit that I do stop, but not when I swing forward. When I serve, I swing my racket back and stop for a split second (this is the only time I have a stop), then swing forward. Once I start swinging forward, there is no stop in motion though. So I want to know, what swing is considered the starting motion of a serve? I've heard from other players that it doesn't matter what you do before, but once you start your forward motion, that's when you can't stop. I already corrected my serve once he told me, but I still want to know what the official ruling is. Does anyone have the official rules for this?