Jie Zheng of China hits a return during her match against Anne Keothavong of Great Britain during day three of the AEGON Classic at Edgbaston Priory Club on June 13, 2012 in Birmingham, England. Birmingham England, Jie Zheng, China Hit, 11 00 Bst, Anne Keothavong, Aegon Classic, Priory Club, Edgbaston Priory, Aegon Championship
Roger Federer of Switzerland speaks to members of the media during a press conference on day three of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on June 26, 2013 in London, England
Britain's Andy Murray celebrates beating Germany's Benjamin Becker during their men's first round match on day one of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on June 24, 2013. Murray won 6-4, 6-3, 6-2
Spain's Rafael Nadal celebrates beating Slovakia's Martin Klizan during their men's singles first round match on day two of the 2014 Wimbledon Championships at The All England Tennis Club in Wimbledon, southwest London, on June 24, 2014. Nadal won 4-6, 6-3, 6-3, 6-3.