Unlike some of his other top-ranked counterparts, Novak Djokovic doesn't seem to give a sh*t about keeping a picture-perfect, always stoic image. I never really knew that about him until he went on "Conan," and they showed a video of him wearing a banana hammock, presumably as a joke, at some fashion show. It was probably a foreign fashion show -- for whatever reason, those people love outlining their c*cks in public. Anyway, today he just came out with a new ad for Head tennis racquets where he pretends to be Maria Sharapova. Djokovic has a long history of impersonating his fellow tennis players — including Sharapova — in post-match or practice court performances, but never quite like this.