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Petra Martic of Croatia serves during the women's singles first round match against Wang Yafan of China at the French Open Tennis Tournament 2018 in Paris, France on May 27, 2018. Petra Martic won by 2-0. (Xinhua/Luo Huanhuan)
Petra Martic of Croatia serves during the women's singles first round match against Wang Yafan of China at the French Open Tennis Tournament 2018 in Paris, France on May 27, 2018. Petra Martic won by 2-0. (Xinhua/Luo Huanhuan)