
Dimitrij Ovtcharov(L) of Germany greets Niwa Koki of Japan after the men's singles match at the 2017 World Table Tennis Championships in Dusseldorf, Germany, June 4, 2017. (Xinhua/Shan Yuqi)

Dimitrij Ovtcharov(L) of Germany greets Niwa Koki of Japan after the men's singles match at the 2017 World Table Tennis Championships in Dusseldorf, Germany, June 4, 2017. (Xinhua/Shan Yuqi)