How is it possible for Fed to create so many ridiculous angles and get dip with such ease? He's also able to use much more of the face of his racket without it resulting in a mishit. It's a very forgiving racket. Admittedly, he is one of, if not the most skilled players out there. But, obviously, the racket has something to do with it. I would like to get some insight into how this may be achieved in a racket from an engineers point of view. Any engineers on these boards have any ideas?