Originally Posted by julian
How far away is a contact? (from a body)
To estimate this well we would need some video shot either from directly behind or directly in front of the player and also to the side.
On the forehand side, for instance, Federer, Nadal, and Djokovic hit the ball away from the body more than players like Nishikori who keeps his elbow closer to his side. On the bh side, I think it is interesting to note that Djokovic keeps his left arm straighter at contact than he does his right arm at contact when hitting a fh. That might not mean the ball is any farther away, because the right hand limits the motion of the swing to some extent on the 2hbh.
When I have time I'll look for some videos with the angles we'd want for Nadal and Djokovic.