Park Record Media Center

Kirsten Flipkens of Belgium celebrates after defeating Petra Kvitova of the Czech Republic in their women's quarter-final tennis match at the Wimbledon Tennis Championships, in London July 2, 2013. REUTERS/Eddie Keogh ( TENNIS-WIMBLEDON/ )

US player Sloane Stephens reacts after a point against France's Marion Bartoli during their women's singles quarter-final match on day eight of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on July 2, 2013. Bartoli won 6-4, 7-5. GLYN KIRK/AFP/Getty Images ( 521087522 )

Marion Bartoli of France, left, shakes hands with Sloane Stephens of the United States after defeating her in a Women's singles quarterfinal match at the All England Lawn Tennis Championships in Wimbledon, London, Tuesday, July 2, 2013. (AP Photo/Anja Niedringhaus) ( Britain Wimbledon Tennis )

Petra Kvitova of the Czech Republic reacts during her women's quarter-final tennis match against Kirsten Flipkens of Belgium at the Wimbledon Tennis Championships, in London July 2, 2013. REUTERS/Eddie Keogh ( TENNIS-WIMBLEDON/ )

Belgium's Kirsten Flipkens celebrates after beating Czech Republic's Petra Kvitova during their women's singles quarter-final match on day eight of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on July 2, 2013. Flipkens won 4-6, 6-3, 6-4. BEN STANSALL/AFP/Getty Images ( 521087160 )

Marion Bartoli of France plays a return to Sloane Stephens of the United States during their Women's singles quarterfinal match at the All England Lawn Tennis Championships in Wimbledon, London, Tuesday, July 2, 2013. (AP Photo/Alastair Grant) ( Britain Wimbledon Tennis )

Ground staff uncover an outer court after rain interrupted play on day eight of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on July 2, 2013. CARL COURT/AFP/Getty Images ( 521084519 )

LONDON, ENGLAND - JULY 02: Spectators sit on court 18 shelter after rain delays play on day eight of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club at Wimbledon on July 2, 2013 in London, England. (Photo by Peter Macdiarmid/Getty Images) ( 172274162 )

Belgium's Kirsten Flipkens kisses the ground after beating Czech Republic's Petra Kvitova during their women's singles quarter-final match on day eight of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on July 2, 2013. Flipkens won 4-6, 6-3, 6-4. ADRIAN DENNIS/AFP/Getty Images ( 521087333 )

LONDON, ENGLAND - JULY 02: Agnieszka Radwanska of Poland shakes hands at the net with Na Li of China after their Ladies' Singles quarter-final match on day eight of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club at Wimbledon on July 2, 2013 in London, England. (Photo by Dennis Grombkowski/Getty Images) ( 172357925 )

LONDON, ENGLAND - JULY 02: Sloane Stephens of United States of America plays a forehand during the Ladies' Singles quarter-final match against Marion Bartoli of France on day eight of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club at Wimbledon on July 2, 2013 in London, England. (Photo by Julian Finney/Getty Images) ( 172494722 )

LONDON, ENGLAND - JULY 02: Petra Kvitova of Czech Republic plays a forehand during the Ladies' Singles quarter-final match against Kirsten Flipkens of Belgium on day eight of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club at Wimbledon on July 2, 2013 in London, England. (Photo by Mike Hewitt/Getty Images) ( 172490979 )

LONDON, ENGLAND - JULY 02: Petra Kvitova of Czech Republic reacts during the Ladies' Singles quarter-final match against Kirsten Flipkens of Belgium on day eight of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club at Wimbledon on July 2, 2013 in London, England. (Photo by Dennis Grombkowski/Getty Images) ( 172491585 )

LONDON, ENGLAND - JULY 02: Sloane Stephens of United States of America plays a backhand during the Ladies' Singles quarter-final match against Marion Bartoli of France on day eight of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club at Wimbledon on July 2, 2013 in London, England. (Photo by Julian Finney/Getty Images) ( 172491563 )

LONDON, ENGLAND - JULY 02: A ballboy holds a tennis ball aloft during the Ladies' Singles quarter-final match between Petra Kvitova of Czech Republic and Kirsten Flipkens of Belgium on day eight of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club at Wimbledon on July 2, 2013 in London, England. (Photo by Mike Hewitt/Getty Images) ( 172491048 )

Kirsten Flipkens of Belgium reacts during her women's quarter-final tennis match against Petra Kvitova of the Czech Republic at the Wimbledon Tennis Championships, in London July 2, 2013. REUTERS/Suzanne Plunkett ( TENNIS-WIMBLEDON/ )

Petra Kvitova of the Czech Republic serves to Kirsten Flipkens of Belgium during their women's quarter-final tennis match at the Wimbledon Tennis Championships, in London July 2, 2013. REUTERS/Suzanne Plunkett ( TENNIS-WIMBLEDON/ )

Petra Kvitova of the Czech Republic plays a return to Kirsten Flipkens of Belgium in their Women's singles quarterfinal match at the All England Lawn Tennis Championships in Wimbledon, London, Tuesday, July 2, 2013. (AP Photo/Kirsty Wigglesworth) ( Britain Wimbledon Tennis )

Petra Kvitova of the Czech Republic receives medical attention during her women's quarter-final tennis match against Kirsten Flipkens of Belgium at the Wimbledon Tennis Championships, in London July 2, 2013. REUTERS/Suzanne Plunkett ( TENNIS-WIMBLEDON/ )

Sloane Stephens of the United States plays a return to Marion Bartoli of France during their Women's singles quarterfinal match at the All England Lawn Tennis Championships in Wimbledon, London, Tuesday, July 2, 2013. (AP Photo/Alastair Grant) ( Britain Wimbledon Tennis )

Li Na of China stretches to play a return to Agnieszka Radwanska of Poland in their Women's singles quarterfinal match at the All England Lawn Tennis Championships in Wimbledon, London, Tuesday, July 2, 2013. (AP Photo/Sang Tan) ( Britain Wimbledon Tennis )

China's Li Na reacts in her women's singles quarter-final match against Poland's Agnieszka Radwanska on day eight of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on July 2, 2013. Radwanska won 7-6, 4-6, 6-2. ADRIAN DENNIS/AFP/Getty Images ( 521083748 )

Sabine Lisicki of Germany reacts as she wins a Women's singles quarterfinal match against Kaia Kanepi of Estonia at the All England Lawn Tennis Championships in Wimbledon, London, Tuesday, July 2, 2013. (AP Photo/Anja Niedringhaus) ( APTOPIX Britain Wimbledon Tennis )

A spectator shelters under an umbrella after rain interrupted play on day eight of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on July 2, 2013. CARL COURT/AFP/Getty Images ( 521084582 )

Ground staff pulls the covers onto Court One as rain halts play between Sloane Stephens of the United States and Marion Bartoli of France in a Women's singles quarterfinal match at the All England Lawn Tennis Championships in Wimbledon, London, Tuesday, July 2, 2013. (AP Photo/Anja Niedringhaus) ( Britain Wimbledon Tennis )

Britain's Andy Murray signs autographs for fans after a training session at the practice courts on day eight of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on July 2, 2013. ADRIAN DENNIS/AFP/Getty Images ( 521079941 )

Serbia's Novak Djokovic hits a shot on a practice court during a training session on day eight of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on July 2, 2013. ADRIAN DENNIS/AFP/Getty Images ( 521079000 )

India's Rohan Bopanna (L) and his partner France's Edouard Roger-Vasselin (R) touch hands between points against Sweden's Robert Lindstedt and Canada's Daniel Nestor in their men's doubles quarter-final match on day eight of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on July 2, 2013. CARL COURT/AFP/Getty Images ( 521076925 )

Serbia's Novak Djokovic attends a training session on day eight of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on July 2, 2013. ADRIAN DENNIS/AFP/Getty Images ( 521078978 )

Britain's Andy Murray attends a training session on day eight of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on July 2, 2013. ADRIAN DENNIS/AFP/Getty Images ( 521078983 )

Poland's Agnieszka Radwanska serves against China's Li Na during their women's singles quarter-final match on day eight of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on July 2, 2013. BEN STANSALL/AFP/Getty Images ( 521081025 )

France's Marion Bartoli returns against US player Sloane Stephens during their women's singles quarter-final match on day eight of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on July 2, 2013. GLYN KIRK/AFP/Getty Images ( 521085648 )

US player Sloane Stephens returns against France's Marion Bartoli during their women's singles quarter-final match on day eight of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on July 2, 2013. GLYN KIRK/AFP/Getty Images ( 521085686 )

Czech Republic's Petra Kvitova returns against Belgium's Kirsten Flipkens during their women's singles quarter-final match on day eight of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on July 2, 2013. BEN STANSALL/AFP/Getty Images ( 521086434 )

Czech Republic's Petra Kvitova uses her towel between points against Belgium's Kirsten Flipkens during their women's singles quarter-final match on day eight of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on July 2, 2013. BEN STANSALL/AFP/Getty Images ( 521086499 )

Chelsea Pensioners watch the action as Czech Republic's Petra Kvitova plays against Belgium's Kirsten Flipkens during their women's singles quarter-final match on day eight of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on July 2, 2013. ADRIAN DENNIS/AFP/Getty Images ( 521084743 )

LONDON, ENGLAND - JULY 02: Kim Cattrall and Seth Numrich sit in the Royal Box before the Ladies' Singles quarter-final match between Agnieszka Radwanska of Poland and Na Li of China on day eight of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club at Wimbledon on July 2, 2013 in London, England. (Photo by Dennis Grombkowski/Getty Images) ( 172137990 )

LONDON, ENGLAND - JULY 02: Sabine Lisicki of Germany celebrates victory during the Ladies' Singles quarter-final match against Kaia Kanepi of Estonia on day eight of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club at Wimbledon on July 2, 2013 in London, England. (Photo by Julian Finney/Getty Images) ( 172234485 )

China's Li Na returns against Poland's Agnieszka Radwanska during their women's singles quarter-final match on day eight of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on July 2, 2013. ADRIAN DENNIS/AFP/Getty Images ( 521080732 )

Agnieszka Radwanska of Poland receives treatment in her women's quarter-final tennis match against Li Na of China at the Wimbledon Tennis Championships, in London July 2, 2013. REUTERS/Suzanne Plunkett ( TENNIS-WIMBLEDON/ )

Germany's Sabine Lisicki (C) serves against Estonia's Kaia Kanepi during their women's quarter final match on day eight of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on July 2, 2013. CARL COURT/AFP/Getty Images ( 521079731 )

Spectators seek shelter as rain delays play in a Women's singles quarterfinal match between Agnieszka Radwanska of Poland and Li Na of China at the All England Lawn Tennis Championships in Wimbledon, London, Tuesday, July 2, 2013. (AP Photo/Kirsty Wigglesworth) ( Britain Wimbledon Tennis )

LONDON, ENGLAND - JULY 02: Marion Bartoli of France celebrates a point during the Ladies' Singles quarter-final match against Sloane Stephens of United States of America on day eight of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club at Wimbledon on July 2, 2013 in London, England. (Photo by Julian Finney/Getty Images) ( 172234911 )

Germany's Sabine Lisicki celebrates beating Estonia's Kaia Kanepi during their women's singles quarter-final match on day eight of the 2013 Wimbledon Championships tennis tournament at the All England Club in Wimbledon, southwest London, on July 2, 2013. Lisicki won 6-3, 6-3. GLYN KIRK/AFP/Getty Images ( 521079073 )