Serbia's Novak Djokovic (C) holds the winner's trophy after defeating Britain's Andy Murray in their men's singles final match on day fourteen of the 2015 Australian Open tennis tournament in Melbourne on February 1, 2015. AFP PHOTO / MANAN VATSYAYANA -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE        (Photo credit should read MANAN VATSYAYANA/AFP via Getty Images)