When serving a straight line should be held through the shoulders and the hitting arm elbow, at least this is what I have gathered. But should the forearm and wrist remain completely flexible? I know that a relaxed hitting arm is key to a good serve but HOW relaxed? I know that when you hit the trophy pose and then start the swing that the upward movement creates the racquet head drop but it seems that this makes the movement of the racquet a little unpredictable and can cause some strain on the shoulder. I tend to make the racquet drop a more conscious movement rather than just letting it happen. Am i doing this correctly or is detrimental to my game?