I've just recovered from an elbow injury (thank goodness it wasn't too bad), which I got from trying to get the fastest speed possible on a serve speed radar I haven't been able to serve fast comfortably for 3-4 months and I've only really been playing around with groundstrokes. But although my elbow feels fine now, I feel like I've lost my muscle memory for serving. At first I saw this as a problem, but now I see it as a chance to start fresh and start serving properly. Now I'm going to try to describe what my old serve was like (I still don't have a camera). It was like a jack-in-the-box technique, similar to Dolgopolov's. I had a fairly short ball toss and jumped and swung my arm at relatively the same time. I noticed that I dont use my legs as much as I should. I know that this isn't exactly a great technique hence I want to try to learn how to serve properly. So I have a bunch of questions. Here they are? 1. The proper way to serve is to jump first then swing your arm. 2. Is Andy Roddick's serve's fundamentals worth learning? 3. Any other good serve tips and pointers would be nice too. PS for those who are curious, the highest serve speed I had was 171 kph.