Serbia's Novak Djokovic celebrates his win over Britain's Andy Murray in the men's final at the Australian Open tennis championship in Melbourne, Australia, Sunday, Jan. 27, 2013. (AP Photo/Dita Alangkara)

Photo by: Dita Alangkara

Serbia's Novak Djokovic celebrates his win over Britain's Andy Murray in the men's final at the Australian Open tennis championship in Melbourne, Australia, Sunday, Jan. 27, 2013. (AP Photo/Dita Alangkara)