Caroline Wozniacki use some towels to imitate Serena Williams during her exhibition match against Maria Sharapova in Sao Paulo.

One of the ball boys makes an amazing catch during the Federer Nadal Semifinal match at the Australian Open. Then there was a cricket reference to Ricky Ponting, and the crowd goes crazy!

Chair Umpire gets hit by Karolina Pliskova return in Indian Wells.

No surprise for Rafael Nadal on the clay of Madrid on Thursday. No surprise except that the Spanish nearly does himself an unusual injury as he chases down a rifled forehand from Jarkko Nieminen in their Mutua Madrid Open third round.

Novak Djokovic doesn't realize he broke a string during his semifinal against Kei Nishikori in Rome.

Andy Roddick imitates Serena Williams during an exhibition night in Toronto. Serena Williams herself, Milos Raonic and Agnieszka Radwanska also took part to this event. (2012-11-16)