Anyone For Tennis?

This is a true champion, one of the all time greatest tennis players. I drew him as a ball molester, just for fun
Can anyone recognize him?

It's a quick caricature to stay in shape (at the moment I have very little time for some serious drawing). The colors and texture effects turned out nicely, but I'm not completely pleased with the basic drawing. There are mistakes, and I wish the caricature was more pushed and exaggerated.