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Andrea Petkovic of Germany returns a shot during the women's singles first round match against Kristina Mladenovic of France at the French Open Tennis Tournament 2018 in Paris, France, on May 28, 2018. (Xinhua/Luo Huanhuan)
Andrea Petkovic of Germany returns a shot during the women's singles first round match against Kristina Mladenovic of France at the French Open Tennis Tournament 2018 in Paris, France, on May 28, 2018. (Xinhua/Luo Huanhuan)