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Zhang Jike (L) of China serves during the men's singles round of 32 match against Jonathan Groth of Danmark at the 2018 ITTF World tour Japan Open in Kitakyushu, Japan, on June 8, 2018. Zhang Jike won 4-1. (Xinhua/Ma Ping)
Zhang Jike (L) of China serves during the men's singles round of 32 match against Jonathan Groth of Danmark at the 2018 ITTF World tour Japan Open in Kitakyushu, Japan, on June 8, 2018. Zhang Jike won 4-1. (Xinhua/Ma Ping)