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Cho Seungmin of South Korea serves during the men's singles quarterfinal match against Ma Long of China at the 2020 ITTF World Tour Platinum German Open in Magdeburg, Germany on Feb. 1, 2020. (Photo by Binh Truong/Xinhua)

Cho Seungmin of South Korea serves during the men's singles quarterfinal match against Ma Long of China at the 2020 ITTF World Tour Platinum German Open in Magdeburg, Germany on Feb. 1, 2020. (Photo by Binh Truong/Xinhua)