
Japan's Koki Niwa serves during the men's team gold medal match of Tabel Tennis against China at the 2016 Rio Olympic Games in Rio de Janeiro, Brazil, on Aug. 15, 2016. (Xinhua/Sheng Bohan)

Japan's Koki Niwa serves during the men's team gold medal match of Tabel Tennis against China at the 2016 Rio Olympic Games in Rio de Janeiro, Brazil, on Aug. 15, 2016. (Xinhua/Sheng Bohan)
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