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Lee Sangsu of South Korea reacts during a men's singles quarterfinal match against Timo Boll of Germany at the 2019 ITTF Czech Open in Olomouc, the Czech Republic, Aug. 24, 2019. (Xinhua/Shan Yuqi)
Lee Sangsu of South Korea reacts during a men's singles quarterfinal match against Timo Boll of Germany at the 2019 ITTF Czech Open in Olomouc, the Czech Republic, Aug. 24, 2019. (Xinhua/Shan Yuqi)