In pics: 2019 Wimbledon Tennis Championships day 9

Kei Nishikori loses his racquet as he attempts to play a backhand during the men's singles quarter-final match between Roger Federer of Switzerland and Kei Nishikori of Japan at the 2019 Wimbledon Tennis Championships in London, Britain, on July 10, 2019. (Xinhua/Han Yan)