Roger Federer and Maria Sharapova in action at Roland Garros
Switzerland's Stanislas Wawrinka returns the ball to Steve Johnson during the men's third round of the 2015 French Open in Paris on May 29, 2015.DOMINIQUE FAGET/AFP / Getty Images
Australia's Samantha Stosur in action against Russia’s Maria Sharapova during the third round at the French Open.Jason Cairnduff/Reuters
France's Nicolas Mahut reacts during his match against France's Gilles Simon.PATRICK KOVARIK/AFP / Getty Images
Roger Federer of Switzerland in action in his match against Damir Dzumhur of Bosnia and Herzegovina.Clive Brunskill/Getty Images
Steve Johnson of the United States returns a shot in his match against Stanislas Wawrinka of Switzerland.Clive Mason/Getty Images
Martina Hingis of Switzerland returns the ball as she plays with Sania Mirza of India against Stephanie Foretz and Amandine Hesse of France during their doubles match at the French Open tennis tournament at the Roland Garros stadium, Friday, May 29, 2015 in Paris.Michel Euler/The Associated Press
Roger Federer of Switzerland serves in his match against Damir Dzumhur of Bosnia and Herzegovina.Clive Brunskill/Getty Images
France's Alize Cornet celebrates after defeating Croatia's Mirjana Lucic-Baroni during the women's third round at the 2015 French Open in Paris on May 29, 2015.PASCAL GUYOT/AFP / Getty Images
Gilles Simon of France casts his shadow on the court during the men's singles match against compatriot Nicolas Mahut.PASCAL ROSSIGNOL/Reuters
France's Nicolas Mahut returns the ball to France's Gilles Simon during the men's third round of the French Open in Paris on May 29, 2015.KENZO TRIBOUILLARD/AFP / Getty Images
Serbia's Ana Ivanovic celebrates after winning her match against Croatia's Donna Vekic.PATRICK KOVARIK/AFP / Getty Images
Czech Republic's Lukas Rosol prepares to serve against Russia's Teymuraz Gabashvili.DOMINIQUE FAGET/AFP / Getty Images
Stanislas Wawrinka opens a new racket during his third-round match.David Vincent/The Associated Press
Elena Vesnina of Russia returns a shot in her women's singles match against Ekaterina Makarova of Russia.Clive Mason/Getty Images
Angelique Kerber of Germany returns a shot during her women's singles match against Garbine Muguruza of Spain.Clive Mason/Getty Images
Gilles Simon of France serves in his men's singles match against Nicolas Mahut of France.Julian Finney/Getty Images
Maria Sharapova of Russia celebrates match point after defeating Samantha Stosur of Australia.Clive Brunskill/Getty Images
France's Gael Monfils returns the ball to Uruguay's Pablo Cuevas.PATRICK KOVARIK/AFP / Getty Images
Czech Republic's Tomas Berdych returns the ball to France's Benoit Paire.DOMINIQUE FAGET/AFP / Getty Images