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Novak Djokovic of Serbia hits a return during the men's singles second round match with Henri Laaksonen of Switzerland at French Open tennis tournament 2019 at Roland Garros, in Paris, France on May 30, 2019. (Xinhua/Han Yan)
Novak Djokovic of Serbia hits a return during the men's singles second round match with Henri Laaksonen of Switzerland at French Open tennis tournament 2019 at Roland Garros, in Paris, France on May 30, 2019. (Xinhua/Han Yan)