Why does the western grip produce more topspin than the eastern? I had always thought that this was because the western grip naturally closes the racket face as you swing. However, after reviewing slow motion clips of pros and reading this page, http://www.hi-techtennis.com/forehand/topspin.php, it is now clear to me that topspin is not produced by the closing of the racket face, but rather by the vertical up movement of the racket while the racket angle remains constant during ball contact. This was a very big suprise to me. When watching the stroke in realtime, it always appeared to me that the racket was coming over the top of the ball to produce topspin, but this is proven to be false. So the question is why does the western produce more topspin. It would have to be that the swing path naturally has a faster vertical up component. But why is this? Why can't you swing upwards as fast with the eastern grip? Thanks in advance.