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Zhao Zihao of China serves during the men's singles quarterfinal match against Xu Xin of China at the 2020 ITTF World Tour Platinum German Open in Magdeburg, Germany, on Feb. 1, 2020. (Photo by Zhang Ping/Xinhua)

Zhao Zihao of China serves during the men's singles quarterfinal match against Xu Xin of China at the 2020 ITTF World Tour Platinum German Open in Magdeburg, Germany, on Feb. 1, 2020. (Photo by Zhang Ping/Xinhua)