By looking at tennis star Novak Djokovic, you probably think that he was a super serious guy.  Maybe on the court he is, but he also knows how to goof around a bit too.  Take for instance his Maria Sharapova impression.

It's some pretty funny stuff from the number one seed in men's tennis. It's good to see that he isn't just all work and no play. It's also good to see that Sharapova can also laugh at it as evidence at the end of the clip.