Novak Djokovic of Serbia reacts after winning match point to defeat Roger Federer of Switzerland in their ATP World Tour Tennis singles final match in London, Monday, Nov. 12, 2012. (A

 

              Novak Djokovic of Serbia reacts after winning match point to defeat Roger Federer of Switzerland in their ATP World Tour Tennis singles final match in London, Monday, Nov.  12, 2012. (A
Novak Djokovic of Serbia reacts after winning match point to defeat Roger Federer of Switzerland in their ATP World Tour Tennis singles final match in London, Monday, Nov. 12, 2012. (AP Photo/Kirsty Wigglesworth)