recently with all the matches with master series and now US Open, i have begun to realize that MANY of the pros use a somewhat abbreviated take-back. roddick- http://www.youtube.com/watch?v=CYhGiGbXtP8 nadal- http://www.youtube.com/watch?v=XK479hCJCsg&mode=related&search= isner-(can't see it clearly but you can tell) http://www.youtube.com/watch?v=YAM-ljwM3i8&mode=related&search= meh. and a bit lazy to find a few, but ive seen many that do not do a really circular takeback. 1. why is this? 2. is it better? 3. is it habits or trained to do so? personally i use a very full take back where the head almost can touch my left pocket.