Mntlblok: The cool still photo that Toly posted with Rafa's racket almost vertical was excellent for demonstration of what happens for sidespin on a high ball. I'm betting that a similar photo could be found of Roddick with a near vertical racket, but with the head pointing to the ground Here is Nadal’s low ball FH with the head pointing to the ground. Figure 1. Nadal’s FH high speed camera Figure 2. Nadal’s FH medium speed camera Figure 3. Nadal’s FH low speed camera With this type of FH Nadal can generate extreme clockwise (above view) sidespin. He even sometimes hits around left net post below net cord.