Originally Posted by user92626
You make things too complicated. Forget the WW thing. Just drive through the ball with racket face open or slightly closed. When the ball goes to the net, your instinct should activate and you want to swing upward as if to drive the ball higher to clear the net. Pros don't care about WW. They drive through the ball like this: http://www.youtube.com/watch?v=u8FoCRbd8bg
Along with the drive through the ball Nadal is violently and explosively whipping the racquet head up through the contact zone. Those balls have a lot of topspin. That stroke just doesn't happen, you need to learn it.