
Ding Ning of China serves the ball during the women's singles quarterfinal match against Kasumi Ishikawa of Japan at the 2017 World Table Tennis Championships in Dusseldorf, Germany, on June 2, 2017. Ding Ning won 4-1. (Xinhua/Luo Huanhuan)

Ding Ning of China serves the ball during the women's singles quarterfinal match against Kasumi Ishikawa of Japan at the 2017 World Table Tennis Championships in Dusseldorf, Germany, on June 2, 2017. Ding Ning won 4-1. (Xinhua/Luo Huanhuan)