French Open Day 8-10

Andreas Seppi of Italy prepares to serve in his fourth round match against Novak Djokovic of Serbia at the French Open tennis tournament in Roland Garros stadium in Paris, Sunday June 3, 2012. (AP Photo/Michel Euler)

Germany's Angelique Kerber reacts as she defeats Croatia's Patra Martic during their fourth round match in the French Open tennis tournament at the Roland Garros stadium in Paris, Sunday, June 3, 2012. Kerber won 6 3, 7 5. (AP Photo/Michel Spingler)

Novak Djokovic of Serbia returns in his fourth round match against Andreas seppi of Italy at the French Open tennis tournament in Roland Garros stadium in Paris, Sunday June 3, 2012. (AP Photo/Michel Euler)

Slovakia's Dominika Cibulkova clenches her fist as she plays Belarus' Victoria Azarenka during their fourth round match in the French Open tennis tournament at the Roland Garros stadium in Paris, Sunday, June 3, 2012. Cibulkova won 6 2, 7 6. (AP Photo/Michel Spingler)

Dominika Cibulkova of Slovakia returns in her fourth round match against Victoria Azarenka of Belarus at the French Open tennis tournament in Roland Garros stadium in Paris, Sunday June 3, 2012. Cibulkova won in two sets 6 2. 7 6. (AP Photo/Christophe Ena)

Rafael Nadal of Spain blows out candles on his birthday cake during a photo opportunity marking his 26th birthday at the French Open tennis tournament in Roland Garros stadium in Paris, Sunday June 3, 2012. (AP Photo/Bernat Armangue)

Novak Djokovic of Serbia returns in his fourth round match against Andreas Seppi of Italy at the French Open tennis tournament in Roland Garros stadium in Paris, Sunday June 3, 2012. (AP Photo/Bernat Armangue)

Switzerland's Roger Federer returns the ball to Belgium's David Goffin during their fourth round match in the French Open tennis tournament at the Roland Garros stadium in Paris, Sunday, June 3, 2012. (AP Photo/Christophe Ena)

Novak Djokovic of Serbia holds his racket over his head in his fourth round match against Andreas Seppi of Italy at the French Open tennis tournament in Roland Garros stadium in Paris, Sunday June 3, 2012. (AP Photo/Bernat Armangue)

David Goffin of Belgium serves in his fourth round match against Roger Federer of Switzerland at the French Open tennis tournament in Roland Garros stadium in Paris, Sunday June 3, 2012. (AP Photo/Michel Spingler)

Novak Djokovic of Serbia, right, talks to Andreas Seppi of Italy, left, after winning his fourth round match at the French Open tennis tournament in Roland Garros stadium in Paris, Sunday June 3, 2012. Djokovic won in five sets 4 6, 6 7, 6 3, 7 5, 6 3. (AP Photo/Bernat Armangue)

Switzerland's Roger Federer clenches his fist as he defeats Belgium's David Goffin during their fourth round match in the French Open tennis tournament at the Roland Garros stadium in Paris, Sunday, June 3, 2012. (AP Photo/Christophe Ena)

Jo Wilfried Tsonga of France returns in his fourth round match against Stanislas Wawrinka of Switzerland at the French Open tennis tournament in Roland Garros stadium in Paris, Sunday June 3, 2012. (AP Photo/Michel Euler)

Stanislas Wawrinka of Switzerland returns in his fourth round match against Jo Wilfried Tsonga of France at the French Open tennis tournament in Roland Garros stadium in Paris, Sunday June 3, 2012. (AP Photo/Michel Euler)

A ball boy hods ball as France's Jo Wilfried Tsonga plays Switzerland's Stanislas Wawrinka during their fourth round match in the French Open tennis tournament at the Roland Garros stadium in Paris, Sunday, June 3, 2012. (AP Photo/Bernat Armangue)

Czech Republic's Tomas Berdych backhands to Argentina's Juan Martin del Potro during their fourth round match in the French Open tennis tournament at the Roland Garros stadium in Paris, Sunday, June 3, 2012. (AP Photo/Michel Spingler)

Jo Wilfried Tsonga of France picks up the ball with his racket in his fourth round match against Stanislas Wawrinka of Switzerland at the French Open tennis tournament in Roland Garros stadium in Paris, Sunday June 3, 2012. (AP Photo/Michel Euler)

Australia's Samantha Stosur serves the ball to USA's Sloane Stephens during their fourth round match in the French Open tennis tournament at the Roland Garros stadium in Paris, Sunday, June 3, 2012. (AP Photo/Bernat Armangue)

USA's Sloane Stephens returns the ball to Australia's Samantha Stosur during their fourth round match in the French Open tennis tournament at the Roland Garros stadium in Paris, Sunday, June 3, 2012. (AP Photo/Bernat Armangue)

Janko Tipsarevic of Serbia clenches his fist after scoring a point in his fourth round match against Nicolas Almagro of Spain at the French Open tennis tournament in Roland Garros stadium in Paris, Monday June 4, 2012. (AP Photo/Michel Euler)

David Ferrer of Spain celebrates reaching the quarter finals after winning his fourth round match against Marcel Granollers of Spain at the French Open tennis tournament in Roland Garros stadium in Paris, Monday June 4, 2012. Ferrer won in three sets 6 3, 6 2, 6 0. (AP Photo/Bernat Armangue)

Spain's Nicolas Almagro goes in the boarding as he plays Serbia's Janko Tipsarevic during their fourth round match in the French Open tennis tournament at the Roland Garros stadium in Paris, Monday, June 4, 2012. Almagro won 6 4, 6 4, 6 4. (AP Photo/Michel Euler)

France's Jo Wilfried Tsonga reacts as he defeats Switzerland's Stanislas Wawrinka during their fourth round match in the French Open tennis tournament at the Roland Garros stadium in Paris, Monday, June 4, 2012. (AP Photo/Bernat Armangue)

Li Na of China returns in her fourth round match against Yaroslava Shvedova of Kazakhstan at the French Open tennis tournament in Roland Garros stadium in Paris, Monday June 4, 2012. (AP Photo/Michel Euler)

Russia's Maria Sharapova returns the ball to Czech Republic's Klara Zakopalova during their fourth round match in the French Open tennis tournament at the Roland Garros stadium in Paris, Monday, June 4, 2012. (AP Photo/Christophe Ena)

Russia's Maria Sharapova returns the ball to Czech Republic's Klara Zakopalova during their fourth round match in the French Open tennis tournament at the Roland Garros stadium in Paris, Monday, June 4, 2012. (AP Photo/Christophe Ena)

Yaroslava Shvedova of Kazakhstan returns in her fourth round match against Li Na of China at the French Open tennis tournament in Roland Garros stadium in Paris, Monday June 4, 2012. (AP Photo/Michel Spingler)

Russia's Maria Sharapova returns the ball to Czech Republic's Klara Zakopalova during their fourth round match in the French Open tennis tournament at the Roland Garros stadium in Paris, Monday, June 4, 2012. (AP Photo/Bernat Armangue)

Russia's Maria Sharapova serves the ball to Czech Republic's Klara Zakopalova during their fourth round match in the French Open tennis tournament at the Roland Garros stadium in Paris, Monday, June 4, 2012. (AP Photo/Christophe Ena)

Russia's Maria Sharapova falls as she plays Czech Republic's Klara Zakopalova during their fourth round match in the French Open tennis tournament at the Roland Garros stadium in Paris, Monday, June 4, 2012. (AP Photo/Christophe Ena)

Yaroslava Shvedova of Kazakhstan celebrates reaching the quarter finals after winning her fourth round match against Li Na of China at the French Open tennis tournament in Roland Garros stadium in Paris, Monday June 4, 2012. Shvedova won in three sets 3 6, 6 2, 6 0. (AP Photo/Michel Spingler)

Yaroslava Shvedova of Kazakhstan celebrates reaching the quarter finals after winning her fourth round match against Li Na of China at the French Open tennis tournament in Roland Garros stadium in Paris, Monday June 4, 2012. Shvedova won in three sets 3 6, 6 2, 6 0. (AP Photo/Michel Spingler)

Andy Murray of Britain returns in his fourth round match against Richard Gasquet of France at the French Open tennis tournament in Roland Garros stadium in Paris, Monday June 4, 2012. (AP Photo/Christophe Ena)

Spain's Rafael Nadal returns the ball to Argentina's Juan Monaco during their fourth round match in the French Open tennis tournament at the Roland Garros stadium in Paris, Monday, June 4, 2012. (AP Photo/Michel Euler)

Andy Murray of Britain screams after missing a return in his fourth round match against Richard Gasquet of France at the French Open tennis tournament in Roland Garros stadium in Paris, Monday June 4, 2012. (AP Photo/Christophe Ena)

Britain's Andy Murray looks up a ball as he plays France's Richard Gasquet during their fourth round match in the French Open tennis tournament at the Roland Garros stadium in Paris, Monday, June 4, 2012. (AP Photo/Bernat Armangue)

Spain's Rafael Nadal returns the ball to Argentina's Juan Monaco in their fourth round match in the French Open tennis tournament at the Roland Garros stadium in Paris, Monday, June 4, 2012. Nadal won 6 2, 6 0, 6 0. (AP Photo/Michel Spingler)

Andy Murray of Britain celebrates reaching the quarter finals after winning his fourth round match against Richard Gasquet of France at the French Open tennis tournament in Roland Garros stadium in Paris, Monday June 4, 2012. Murray won in four sets 1 6, 6 4, 6 1, 6 2. (AP Photo/Christophe Ena)

Angelique Kerber of Germany gestures in her quarter final match against Sara Errani of Italy at the French Open tennis tournament in Roland Garros stadium in Paris, Tuesday June 5, 2012. (AP Photo/Bernat Armangue)

Germany's Angelique Kerber returns the ball to Italy's Sara Errani during their quarterfinal match in the French Open tennis tournament at the Roland Garros stadium in Paris, Tuesday, June 5, 2012. (AP Photo/Michel Euler)

Sara Errani of Italy returns in her quarter final match against Angelique Kerber of Germany at the French Open tennis tournament in Roland Garros stadium in Paris, Tuesday June 5, 2012. (AP Photo/Bernat Armangue)

Italy's Sara Errani v Germany's Angelique Kerber during their quarterfinal match in the French Open tennis tournament at the Roland Garros stadium in Paris, Tuesday, June 5, 2012. (AP Photo/Michel Euler)

Sara Errani of Italy returns in her quarter final match against Angelique Kerber of Germany at the French Open tennis tournament in Roland Garros stadium in Paris, Tuesday June 5, 2012. (AP Photo/Bernat Armangue)

Slovakia's Dominika Cibulkova returns the ball to Australia's Samantha Stosur during their quarterfinal match in the French Open tennis tournament at the Roland Garros stadium in Paris, Tuesday, June 5, 2012. (AP Photo/Christophe Ena)

Australia's Samantha Stosur returns the ball to Slovakia's Dominika Cibulkova during their quarterfinal match in the French Open tennis tournament at the Roland Garros stadium in Paris, Tuesday, June 5, 2012. (AP Photo/Christophe Ena)

Samantha Stosur of Australia celebrates winning her quarter final match against Dominika Cibulkova of Slovakia at the French Open tennis tournament in Roland Garros stadium in Paris, Tuesday June 5, 2012. Stosur won in two sets 6 4, 6 1. (AP Photo/Christophe Ena)

Australia's Samantha Stosur walks back to her chair during a break as she plays Slovakia's Dominika Cibulkova during their quarterfinal match in the French Open tennis tournament at the Roland Garros stadium in Paris, Tuesday, June 5, 2012. Stosur won 6 4, 6 1. (AP Photo/Michel Spingler)

Sara Errani of Italy celebrates winning her quarter final match against Angelique Kerber of Germany at the French Open tennis tournament in Roland Garros stadium in Paris, Tuesday June 5, 2012. Errani won in two sets 6 3, 7 6. (AP Photo/Michel Euler)

Italy's Sara Errani reacts as she defeats Germany's Angelique Kerber in their quarterfinal match in the French Open tennis tournament at the Roland Garros stadium in Paris, Tuesday, June 5, 2012. Errani won 6 3, 7 6. (AP Photo/Bernat Armangue)

Sara Errani of Italy eyes the ball as she returns in her quarter final match against Angelique Kerber of Germany at the French Open tennis tournament in Roland Garros stadium in Paris, Tuesday June 5, 2012. Errani won in two sets 6 3, 7 6. (AP Photo/Michel Euler)

France's Jo Wilfired Tsonga serves the ball to Serbia's Novak Djokovic during their quarterfinal match in the French Open tennis tournament at the Roland Garros stadium in Paris, Tuesday, June 5, 2012. (AP Photo/Michel Spingler)

A bead of sweat is seen on the forehead of Jo Wilfried Tsonga of France in his quarter final match against Novak Djokovic of Serbia at the French Open tennis tournament in Roland Garros stadium in Paris, Tuesday June 5, 2012. (AP Photo/Christophe Ena)

Roger Federer of Switzerland prepares to serve in his quarter final match against Juan Martin del Potro of Argentina at the French Open tennis tournament in Roland Garros stadium in Paris, Tuesday June 5, 2012. (AP Photo/Christophe Ena)

Serbia's Novak Djokovic reacts as he plays France's Jo Wilfired Tsonga during their quarterfinal match in the French Open tennis tournament at the Roland Garros stadium in Paris, Tuesday, June 5, 2012. (AP Photo/Michel Spingler)

Serbia's Novak Djokovic returns the ball to France's Jo Wilfired Tsonga during their quarterfinal match in the French Open tennis tournament at the Roland Garros stadium in Paris, Tuesday, June 5, 2012. (AP Photo/Michel Spingler)

Jo Wilfried Tsonga of France reacts in his quarter final match against Novak Djokovic of Serbia at the French Open tennis tournament in Roland Garros stadium in Paris, Tuesday June 5, 2012. (AP Photo/Michel Spingler)

Roger Federer of Switzerland celebrates winning his quarter final match against Juan Martin del Potro of Argentina at the French Open tennis tournament in Roland Garros stadium in Paris, Tuesday June 5, 2012. Federer won in five sets 3 6, 6 7, 6 2, 6 0, 6 3. (AP Photo/Michel Euler)

Roger Federer of Switzerland, right, hugs Juan Martin del Potro of Argentina, left, after he won his quarter final match at the French Open tennis tournament in Roland Garros stadium in Paris, Tuesday June 5, 2012. Federer won in five sets 3 6, 6 7, 6 2, 6 0, 6 3. (AP Photo/Michel Euler)

Serbia's Novak Djokovic reacts as he defats France's Jo Wilfried Tsonga in their quarterfinal match in the French Open tennis tournament at the Roland Garros stadium in Paris, Tuesday, June 5, 2012. (AP Photo/MichelSpingler)

Novak Djokovic of Serbia celebrates winning his quarter final match against Jo Wilfried Tsonga of France at the French Open tennis tournament in Roland Garros stadium in Paris, Tuesday June 5, 2012. Djokovic won in five sets 6 1, 5 7, 5 7, 7 6, 6 1. (AP Photo/Michel Euler)

Jo Wilfried Tsonga of France, left, congratulates Novak Djokovic of Serbia after losing his quarter final match at the French Open tennis tournament in Roland Garros stadium in Paris, Tuesday June 5, 2012. Djokovic won in five sets 6 1, 5 7, 5 7, 7 6, 6 1. (AP Photo/Christophe Ena)