Russia's Maria Sharapova serves to Germany's Andrea Petkovic during their Women's quarter final in the French Open tennis championship at the Roland Garros stadium, on June 1, 2011, in Paris. AFP PHOTO / ALEXANDER KLEIN

China's Li Na celebrates after winning against Czech Republic's Petra Kvitova during their Women's fourth round match in the French Open tennis championship at the Roland Garros stadium, on May 30, 2011, in Paris. AFP PHOTO

Czech Republic's Petra Kvitova hits a return to China's Li Na during their Women's fourth round match in the French Open tennis championship at the Roland Garros stadium, on May 30, 2011, in Paris. AFP PHOTO

Daniela Hantuchova of Slovakia celebrates defeating Caroline Wozniacki of Denmark in the third round match of the French Open tennis tournament at Roland Garros stadium in Paris, Friday May 27, 2011. Hantuchova won in two sets 6-1, 6-3. (AP Photo/Michel Spingler)

Netherland's Arantxa Rus reacts after winning over Belgium's Kim Clijsters during their Women's second round match in the French Open tennis championship at the Roland Garros stadium, on May 26, 2011, in Paris. AFP PHOTO / JACQUES DEMARTHON

Bildnummer: 07915998 Datum: 25.05.2011 Copyright: imago/Claus Bergmann Julia GOERGES (GER) celebrates her victory after matchpoint on Court 2 Tennis French Open Paris Mi. 25.05.2011 ; Damen Tennis French Open Grand Slam WTA Tour Paris Aktion Einzelbild vdig xdp xo0x 2011 hoch Aufmacher premiumd Tennis Spielszene Action Paris Grand Slam Turnier Roland Garros Sandplatz Asche Frankreich Image number 07915998 date 25 05 2011 Copyright imago Claus Bergmann Juliet Goerges ger Celebrates her Victory After Match Point ON Court 2 Tennis French Open Paris Wed 25 05 2011 women Tennis French Open Grand Slam WTA Tour Paris Action shot Single Vdig xo0x 2011 vertical Highlight premiumd Tennis Game scene Action Paris Grand Slam Tournament Roland Garros Clay Ash France

Bildnummer: 07917813 Datum: 26.05.2011 Copyright: imago/H.J.D. Production?s Roland Garros 2011 Day05 26.05.2011 Arantxa Rus NED. ; xox xsk 2011 hoch premiumd French-Open Paris Roland Garros Clay Image number 07917813 date 26 05 2011 Copyright imago H J D Production?s Roland Garros 2011 Day05 26 05 2011 Arantxa RUS NED xsk 2011 vertical premiumd French Open Paris Roland Garros Clay

Russia's Maria Sharapova reacts during a match with France's Caroline Garcia during their Women's second round match in the French Open tennis championship at the Roland Garros stadium, on May 26, 2011, in Paris. AFP PHOTO / JACQUES DEMARTHON

Denmark's Caroline Wozniacki reacts after her victory over Japan's Kimiko Date-Krumm during their Women's first round match in the French Open tennis championship at the Roland Garros stadium, on May 23, 2011, in Paris. AFP PHOTO / MIGUEL MEDINA

Serbian's Jelena Jankovic reacts after winning over Ukraine's Alona Bondarenko during their Women's first round match in the French Open tennis championship at the Roland Garros stadium, on May 22, 2011, in Paris. The event runs from May 22 to June 5, 2011. Jankovic won 6-3, 6-1. AFP PHOTO / MIGUEL MEDINA