China's Zheng Saisai (L) and Varvara Lepchenko of the United States compete during the women's doubles second round match against Romania's Irina-Camelia Begu and Slovakia's Magdalena Rybarikova at the 2013 French Open tennis tournament in Paris, France, on June 1, 2013. Zheng Saisai and Varvara Lepchenko won 2-1. (Xinhua/Bai Xue)

China's Zheng Saisai (L) and Varvara Lepchenko of the United States greet the audience after the women's doubles second round match against Romania's Irina-Camelia Begu and Slovakia's Magdalena Rybarikova at the 2013 French Open tennis tournament in Paris, France, on June 1, 2013. Zheng Saisai and Varvara Lepchenko won 2-1. (Xinhua/Bai Xue)

China's Zheng Saisai (L) and Varvara Lepchenko of the United States celebrate after the women's doubles second round match against Romania's Irina-Camelia Begu and Slovakia's Magdalena Rybarikova at the 2013 French Open tennis tournament in Paris, France, on June 1, 2013. Zheng Saisai and Varvara Lepchenko won 2-1. (Xinhua/Bai Xue)

China's Zheng Saisai (L) and Varvara Lepchenko of the United States compete during the women's doubles second round match against Romania's Irina-Camelia Begu and Slovakia's Magdalena Rybarikova at the 2013 French Open tennis tournament in Paris, France, on June 1, 2013. Zheng Saisai and Varvara Lepchenko won 2-1. (Xinhua/Bai Xue)