LONDON, July 7, 2016 (Xinhua) -- Roger Federer of Switzerland returns the ball to Marin Cilic of Croatia during the men's singles quarterfinal on Day 9 at the Championships Wimbledon 2016 in London, Britain on July 6, 2016. (Xinhua/Ye Pingfan)
LONDON, July 7, 2016 (Xinhua) -- Roger Federer of Switzerland returns the ball to Marin Cilic of Croatia during the men's singles quarterfinal on Day 9 at the Championships Wimbledon 2016 in London, Britain on July 6, 2016. (Xinhua/Ye Pingfan)