
Roger Federer of Switzerland returns the ball during the men's singles fourth round match with Grigor Dimitrov of Bulgaria during Day 7 of the Wimbledon Championship 2017 in London, Britain on July 10, 2017. Roger Federer won 3-0. (Xinhua/Han Yan)
 
 
Roger Federer of Switzerland returns the ball during the men's singles fourth round match with Grigor Dimitrov of Bulgaria during Day 7 of the Wimbledon Championship 2017 in London, Britain on July 10, 2017. Roger Federer won 3-0. (Xinhua/Han Yan)