There is a crazy Austrian tennis player that shouts at line judges, throws rackets, screams at the audience, trash-talks players, and behaves like a complete lunatic on court. His name is Daniel Köllerer and he is called “Crazy Dani”. This guy is hated and loved (mostly hated though) and can in all fairness be quite entertaining to watch. Today he beat Mario Ancic in two straight sets. But Ancic is injured most of the time so it doesn’t say that much about the guy’s strength. Instead, check him out on Youtube.
Daniel Koellerer teaching the umpire
Crazy against Del Potro