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Eugenie Bouchard of Canada plays a forehand during her Ladies' Singles second round match against Ana Ivanovic of Serbia 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. (Photo by Mike Hewitt/Getty Images) ( 171536284 )

Dustin Brown of Germany reacts during his men's singles tennis match against Lleyton Hewitt of Australia at the Wimbledon Tennis Championships, in London June 26, 2013. REUTERS/Stefan Wermuth ( TENNIS-WIMBLEDON/ )

Fernando Verdasco of Spain hits a return to Julien Benneteau of France in their men's singles tennis match at the Wimbledon Tennis Championships, in London June 26, 2013. REUTERS/Suzanne Plunkett ( TENNIS-WIMBLEDON/ )

Australian fans with a painted facees watch Germany's Dustin Brown play against Australia's Lleyton Hewitt during their second round men's singles match on day three of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on June 26, 2013. Brown won 6-4, 6-4, 6-7, 6-2. ADRIAN DENNIS/AFP/Getty Images ( 520898543 )

Sloane Stephens of the United States returns to Andrea Petkovic of Germany during their Women's second round singles match at the All England Lawn Tennis Championships in Wimbledon, London, Wednesday, June 26, 2013. (AP Photo/Kirsty Wigglesworth) ( Britain Wimbledon Tennis )

Maria Sharapova of Russia serves during her Ladies' Singles second round match against Michelle Larcher de Brito of Portugal 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. (Photo by Dennis Grombkowski/Getty Images) ( 171543381 )

Julien Benneteau of France lays on the court after slipping over as he plays Fernando Verdasco of Spain during their Men's second round singles match at the All England Lawn Tennis Championships in Wimbledon, London, Wednesday, June 26, 2013. (AP Photo/Sang Tan) ( Britain Wimbledon Tennis )

Nicolas Almagro of Spain reacts to a line call in his men's singles tennis match against Guillaume Rufin of France at the Wimbledon Tennis Championships, in London June 26, 2013. REUTERS/Eddie Keogh ( TENNIS-WIMBLEDON/ )

Dustin Brown of Germany dives to return a shot during his Gentlemen's Singles second round match against Lleyton Hewitt of Australia 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. (Photo by Dennis Grombkowski/Getty Images) ( 171531905 )

France's Julien Benneteau reacts after losing against Spain's Fernando Verdasco during their second round men's singles match on day three of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on June 26, 2013. Verdasco won 7-6, 7-6, 6-4. GLYN KIRK/AFP/Getty Images ( 520897807 )

Alize Cornet of France plays a backhand during her Ladies' Singles second round match against Su-Wei Hsieh of Taipei 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. (Photo by Julian Finney/Getty Images) ( 171533794 )

Maria Sharapova of Russia slips during her women's singles tennis match against Michelle Larcher De Brito of Portugal at the Wimbledon Tennis Championships, in London June 26, 2013. REUTERS/Stefan Wermuth ( TENNIS-WIMBLEDON/ )

Fernando Verdasco of Spain plays a forehand during his Gentlemen's Singles second round match against Julien Benneteau of France 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. (Photo by Clive Brunskill/Getty Images) ( 171540213 )

Australian fans cheer in the crowd as Australia's Lleyton Hewitt against Germany's Dustin Brown during their men's second round match on day three of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on June 26, 2013. Brown won 6-4, 6-4, 7-6, 6-2. ADRIAN DENNIS/AFP/Getty Images ( 520895573 )

Sloane Stephens of United States of America plays a backhand during her Ladies' Singles second round match against Andrea Petkovic of Germany 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. (Photo by Julian Finney/Getty Images) ( 171540371 )

Andrea Petkovic of Germany plays a forehand during her Ladies' Singles second round match against Sloane Stephens of United States of America 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. (Photo by Julian Finney/Getty Images) ( 171540749 )

Jo-Wilfried Tsonga of France plays a forehand during his Gentlemen's Singles second round match against Ernests Gulbis of Latvia 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. (Photo by Mike Hewitt/Getty Images) ( 171540756 )

Andy Murray of Great Britain plays a forehand during his Gentlemen's Singles second round match against Lu Yen-Hsun of Taipei 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. (Photo by Clive Brunskill/Getty Images) ( 171543013 )

Michelle Larcher de Brito of Portugal shakes hands at the net with Maria Sharapova of Russia after their Ladies' Singles second round match 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. (Photo by Dennis Grombkowski/Getty Images) ( 171543145 )

Eugenie Bouchard of Canada reacts after defeating Ana Ivanovic of Serbia in their women's singles tennis match at the Wimbledon Tennis Championships, in London June 26, 2013. REUTERS/Toby Melville ( TENNIS-WIMBLEDON/ )

Mikhail Youzhny of Russia celebrates after defeating Vasek Pospisil of Canada in their men's singles tennis match at the Wimbledon Tennis Championships, in London June 26, 2013. REUTERS/Eddie Keogh ( TENNIS-WIMBLEDON/ )

Lu Yen-Hsun of Taiwan hits a return to Andy Murray of Britain in their men's singles tennis match at the Wimbledon Tennis Championships, in London June 26, 2013. REUTERS/Suzanne Plunkett ( TENNIS-WIMBLEDON/ )

Andy Murray of Britain hits a return to Lu Yen-Hsun of Taiwan in their men's singles tennis match at the Wimbledon Tennis Championships, in London June 26, 2013. REUTERS/Suzanne Plunkett ( TENNIS-WIMBLEDON/ )

Julien Benneteau of France smashes the ball to Fernando Verdasco of Spain during their Men's second round singles match at the All England Lawn Tennis Championships in Wimbledon, London, Wednesday, June 26, 2013. (AP Photo/Sang Tan) ( APTOPIX Britain Wimbledon Tennis )

Britain's Andy Murray serves to Lu Yen-Hsun of Taiwan during their Men's second round singles match at the All England Lawn Tennis Championships in Wimbledon, London, Wednesday, June 26, 2013. (AP Photo/Sang Tan) ( Britain Wimbledon Tennis )

Maria Sharapova of Russia is attended to by a physiotherapist during her Women's second round singles match against Michelle Larcher De Brito of Portugal at the All England Lawn Tennis Championships in Wimbledon, London, Wednesday, June 26, 2013. (AP Photo/Anja Niedringhaus) ( Britain Wimbledon Tennis )

Spain's Nicolas Almagro returns against France's Guillaume Rufin during their second round men's singles match on day three of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on June 26, 2013. Almagro won 7-5, 6-7, 6-3, 6-4. BEN STANSALL/AFP/Getty Images ( 520897265 )

Canada's Eugenie Bouchard returns against Serbia's Ana Ivanovic during their women's second round match on day three of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on June 26, 2013. Bouchard won 6-3, 6-3. CARL COURT/AFP/Getty Images ( 520898023 )

Latvia's Ernests Gulbis returns against France's Jo-Wilfried Tsonga during their second round men's singles match on day three of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on June 26, 2013. French sixth seed Tsonga was forced to retire from his Wimbledon second round match against Gulbis with a knee injury. CARL COURT/AFP/Getty Images ( 520898988 )

Switzerland's Roger Federer returns against Ukraine's Sergiy Stakhovsky during their second round men's singles match on day three of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on June 26, 2013. CARL COURT/AFP/Getty Images ( 520899787 )

Russia's Maria Sharapova returns against Portugal's Michelle Larcher De Brito during her second round women's singles match against on day three of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on June 26, 2013. ADRIAN DENNIS/AFP/Getty Images ( 520900280 )

Roger Federer of Switzerland serves to Sergiy Stakhovsky of Ukraine during their Men's second round singles match at the All England Lawn Tennis Championships in Wimbledon, London, Wednesday, June 26, 2013. (AP Photo/Alastair Grant) ( Britain Wimbledon Tennis )