Serbia's Novak Djokovic celebrates beating Switzerland's Roger Federer during their men's singles final match on Centre Court on day thirteen of the 2015 Wimbledon Championships at The All England Tennis Club in Wimbledon, southwest London, on July 12, 2015. Djokovic won the match 7-6, 6-7, 6-4, 6-3. RESTRICTED TO EDITORIAL USE -- AFP PHOTO / POOL / TOBY MELVILLE (Photo credit should read TOBY MELVILLE/AFP/Getty Images)
