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MONTE-CARLO, MONACO - APRIL 14: Laureus World Sportsman of the Year 2015 winner and Tennis player Novak Djokovic of Serbia receives his award from Princess Charlene of Monaco at the Monte-Carlo Sporting Club on April 14, 2015 in Monte-Carlo, Monaco. (Photo by Julian Finney/Getty Images for Laureus)

MONTE-CARLO, MONACO - APRIL 14:  Laureus World Sportsman of the Year 2015 winner and Tennis player Novak Djokovic of Serbia receives his award from Princess Charlene of Monaco at the Monte-Carlo Sporting Club on April 14, 2015 in Monte-Carlo, Monaco.  (Photo by Julian Finney/Getty Images for Laureus)