Sven Michel of Switzerland competes during the mixed doubles round robin match against China at 2018-2019 WCF World Cup Grand Final in Beijing, China, May 10, 2019. Switzerland won 10-1. (Xinhua/Jia Yuchen)

Sven Michel of Switzerland competes during the mixed doubles round robin match against China at 2018-2019 WCF World Cup Grand Final in Beijing, China, May 10, 2019. Switzerland won 10-1. (Xinhua/Jia Yuchen)

Michele Jaeggi (L) and Sven Michel of Switzerland compete during the mixed doubles round robin match against China at 2018-2019 WCF World Cup Grand Final in Beijing, China, May 10, 2019. Switzerland won 10-1. (Xinhua/Jia Yuchen)