Serbia's Djokovic returns the ball during his singles tennis match against France's Tsonga at the ATP World Tour Finals in the O2 Arena in London

 
Serbia
Serbia's Novak Djokovic plays a return during his singles tennis match against France's Jo-Wilfried Tsonga at the ATP World Tour Finals in the O2 Arena in London November 5, 2012. REUTERS/Kieran Doherty
Tags: london , WORLD