Australia's Nick Kyrgios (L) shakes hands with Spain's Rafael Nadal (R) after Kyrgios won their men's singles fourth round match against on day eight of the 2014 Wimbledon Championships at The All England Tennis Club in Wimbledon, southwest London, on July 1, 2014. Kyrgios won 7-6, 5-7, 7-6, 6-3. AFP PHOTO / CARL COURT  - RESTRICTED TO EDITORIAL USE        (Photo credit should read CARL COURT/AFP/Getty Images)