Serbia's Novak Djokovic celebrates beating Switzerland's Roger Federer by eating a blade of grass after 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 / ADRIAN DENNIS