Originally Posted by arche3
I think Serena and other pros pull the bicep and use internal rotation of the shoulders to whip the head of the racket at contact. It seems a normal part of the modern type stroke. If you watch old era guys with wood rackets they don't really do this. Its like the serve really. In the serve you serve up so the hand will slow down as the racket whips through the serve. The conti grip and pronation on serve allows this. The fh now follows similar principles of the whip applied in a different way.
Agreed. I haven't studied the pros who wielded wooden racquets much... but I am sure some were very modern - like Bjorn Borg, for instance!