
David Ferrer of Spain returns the ball to Roger Federer of Switzerland during their third round of men's singles match at the 2017 Rogers Cup in Montreal, Canada, Aug. 10, 2017. Roger Federer won 2-1. (Xinhua/Andrew Soong)

David Ferrer of Spain returns the ball to Roger Federer of Switzerland during their third round of men's singles match at the 2017 Rogers Cup in Montreal, Canada, Aug. 10, 2017. Roger Federer won 2-1. (Xinhua/Andrew Soong)