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MELBOURNE, AUSTRALIA - JANUARY 29: Novak Djokovic of Serbia poses with the Norman Brookes Challenge Cup and the clock after winning championship point and playing in the longest grand slam final ever in his men's final match against Rafael Nadal of Spain during day fourteen of the 2012 Australian Open at Melbourne Park on January 29, 2012 in Melbourne, Australia. (Photo by Scott Barbour/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 29:  Novak Djokovic of Serbia poses with the Norman Brookes Challenge Cup and the clock after winning championship point and playing in the longest grand slam final ever in his men's final match against Rafael Nadal of Spain during day fourteen of the 2012 Australian Open at Melbourne Park on January 29, 2012 in Melbourne, Australia.  (Photo by Scott Barbour/Getty Images)