Serbia's Novak Djokovic falls to the ground during his men's singles second round match against Czech Republic's Radek Stepanek on day three of the 2014 Wimbledon Championships at The All England Tennis Club in Wimbledon, southwest London, on June 25, 2014. AFP PHOTO / ANDREW YATES  - RESTRICTED TO EDITORIAL USE        (Photo credit should read ANDREW YATES/AFP/Getty Images)