
Zhang Jike of China serves during men's singles third round match against Lee Sangsu of South Korea at the 2017 World Table Tennis Championships in Dusseldorf, Germany, on June 2, 2017. Lee Sangsu won 4-1. (Xinhua/Tao Xiyi)

Zhang Jike of China serves during men's singles third round match against Lee Sangsu of South Korea at the 2017 World Table Tennis Championships in Dusseldorf, Germany, on June 2, 2017. Lee Sangsu won 4-1. (Xinhua/Tao Xiyi)