Novak Djokovic always has a backup plan if this tennis thing doesn't work out. The singing Serb, who got all gussied up in a peak-lapel grey suit, took part in the semifinal round of Eurovision 2008 where Belgrade is the host city.
Nole hums a tune then throws a giant yellow tennis ball into the crowd to get the voting started. What a ham.
Check it out:
(image via novak-djokovic.com)