Maria Sharapova of Russia gestures to spectators after her women's singles first round match against Su-Wei Hsieh of Chinese Taipei during the 2013 French Open tennis tournament at Roland Garros in Paris, France, May 27, 2013. Sharapova won 2-0. (Xinhua/Bai Xue)

Rafael Nadal of Spain celebrates after his men's singles first round match against Daniel Brands of Germany during the 2013 French Open tennis tournament at Roland Garros in Paris, France, May 27, 2013. Nadal won 3-1. (Xinhua/Bai Xue)

Rafael Nadal of Spain serves to Daniel Brands of Germany during their men's singles first round match of the 2013 French Open tennis tournament at Roland Garros in Paris, France, May 27, 2013. Nadal won 3-1. (Xinhua/Bai Xue)

Maria Sharapova of Russia returns a shot to Su-Wei Hsieh of Chinese Taipei during their women's singles first round match of the 2013 French Open tennis tournament at Roland Garros in Paris, France, May 27, 2013. Sharapova won 2-0. (Xinhua/Bai Xue)

Rafael Nadal of Spain celebrates after his men's singles first round match against Daniel Brands of Germany during the 2013 French Open tennis tournament at Roland Garros in Paris, France, May 27, 2013. Nadal won 3-1. (Xinhua/Bai Xue)

Maria Sharapova of Russia serves to Su-Wei Hsieh of Chinese Taipei during their women's singles first round match of the 2013 French Open tennis tournament at Roland Garros in Paris, France, May 27, 2013. Sharapova won 2-0. (Xinhua/Bai Xue)

Maria Sharapova of Russia serves to Su-Wei Hsieh of Chinese Taipei during their women's singles first round match of the 2013 French Open tennis tournament at Roland Garros in Paris, France, May 27, 2013. Sharapova won 2-0. (Xinhua/Bai Xue)