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Dimitrij Ovtcharov of Germany serves during the men's singles final match against Lin Yun-Ju of Chinese Taipei at the 2019 ITTF Czech Open in Olomouc, the Czech Republic, Aug. 25, 2019. (Xinhua/Shan Yuqi)

Dimitrij Ovtcharov of Germany serves during the men's singles final match against Lin Yun-Ju of Chinese Taipei at the 2019 ITTF Czech Open in Olomouc, the Czech Republic, Aug. 25, 2019. (Xinhua/Shan Yuqi)