Zheng Saisai (front) and Xu Yifan of China compete during the women's doubles first round of tennis against Liudmyla Kichenok/Nadiia Kichenok of Ukraine in Rio de Janeiro, Brazil, on Aug. 7, 2016. Zheng Saisai and Xu Yifan won with 2:0.

Zheng Saisai (behind) and Xu Yifan of China celebrate after the women's doubles first round of tennis against Liudmyla Kichenok/Nadiia Kichenok of Ukraine in Rio de Janeiro, Brazil, on Aug. 7, 2016. Zheng Saisai and Xu Yifan won with 2:0.

Zheng Saisai (2nd L) and Xu Yifan (1st L) of China shake hands with Liudmyla Kichenok and Nadiia Kichenok of Ukraine after the women's doubles first round of tennis in Rio de Janeiro, Brazil, on Aug. 7, 2016. Zheng Saisai and Xu Yifan won with 2:0.

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