Novak Djokovic of Serbia hits a return to Juan Carlos Ferrero of Spain during their men's singles tennis match at the Wimbledon tennis championships in London June 25, 2012. — Reuters Photo

Jelena Ristic (2nd L), partner of Serbian player Novak Djokovic, watches his first round men's singles victory over Spain's Juan Carlos Ferrero on the first day of the 2012 Wimbledon Championships tennis tournament at the All England Tennis Club in Wimbledon, southwest London, on June 25, 2012. — AFP Photo

Novak Djokovic of Serbia reacts after defeating Juan Carlos Ferrero of Spain in their men's singles tennis match at the Wimbledon tennis championships in London June 25, 2012. — Reuters Photo

Line judge Andrew McDougall officiates during the men's singles tennis match between Fernando Verdasco of Spain and Jimmy Wang of Taiwan at the Wimbledon tennis championships in London June 25, 2012. McDougall was injured on June 17 when David Nalbandian of Argentina kicked over a sign that hit him during a match at the tournament at Queen's. — Reuters Photo

Venus Williams of the United States, right, gestures as she leaves after she was defeated by Elena Vesnina of Russia, foreground left, following a first round women's singles match at the All England Lawn Tennis Championships at Wimbledon, England, Monday, June 25, 2012. — AP Photo

Russia's Maria Sharapova serves during her first round women's singles match against Australia's Anastasia Rodionova on the first day of the 2012 Wimbledon Championships tennis tournament at the All England Tennis Club in Wimbledon, southwest London, on June 25, 2012. — AFP Photo

Russia's Elena Vesnina (3rd L) smiles as she watches a BBC TV cameraman take a tumble onto No 2 Court after her match with US player Venus WIlliams on the first day of the 2012 Wimbledon Championships tennis tournament at the All England Tennis Club in Wimbledon, southwest London, on June 25, 2012. — AFP Photo

Roger Federer of Switzerland hits a return to Albert Ramos of Spain during their men's singles tennis match at the Wimbledon tennis championships in London June 25, 2012. — Reuters Photo

Roger Federer of Switzerland sits on his seat during his men's singles tennis match against Albert Ramos of Spain at the Wimbledon tennis championships in London June 25, 2012. — Reuters Photo

Latvia's Ernests Gulbis celebrates his first round men's singles victory over Czech Republic's Tomas Berdych on the first day of the 2012 Wimbledon Championships tennis tournament at the All England Tennis Club in Wimbledon, southwest London, on June 25, 2012. — AFP Photo

View of Court 8 during the first round women's singles match between Romania's Edina Gallovits-Hall and Spain's Silvia Soler-Espinosa on the first day of the 2012 Wimbledon Championships tennis tournament at the All England Tennis Club in Wimbledon, southwest London, on June 25, 2012. — AFP Photo

Britain's Heather Watson plays a shot during her first round women's singles victory over Czech Republic's Iveta Benesova on the first day of the 2012 Wimbledon Championships tennis tournament at the All England Tennis Club in Wimbledon, southwest London, on June 25, 2012. — AFP Photo