
Stan Wawrinka of Switzerland gestures during the men's quarterfinal against Marin Cilic of Croatia at the 2017 French Open Tennis Tournament in Paris, France on June 7, 2017. Stan Wawrinka won 3-0.(Xinhua/Jean-Marie Hervio)

Stan Wawrinka of Switzerland gestures during the men's quarterfinal against Marin Cilic of Croatia at the 2017 French Open Tennis Tournament in Paris, France on June 7, 2017. Stan Wawrinka won 3-0.(Xinhua/Jean-Marie Hervio)