Mark Philipoussis' first and second serves are both very effective, possessing sped, spin, and height. The last aspect is what interests me most because Mark Philipoussis is able to hit first serves that bounce as high as the kickers of fellow servers. In order to show this uncanny ability to bounce the ball higher than his opponents I have taken a match where he and his opponent, Safin, are the same height yet Philipoussis' first serve bounces on average 6 inches higher than Safin's while moving at a similar speed and having what seems like a similar amount of spin. The aspect of creating height after the bounce on a first serve interests me because I can compensate for my lack of height by producing a serve that is moving fast yet out of the opponents strike zone. How does Philipoussis' serve have more height, and what can I implement from his game to better my own.http://www.youtube.com/watch?v=Mw7-1KxKZJA This is an example of Philipoussis' serve versus Safin's. Or am I imagining the steeper trajectory after the bounce?