Spectators on the grounds during the Wimbledon Championships at the All England Lawn Tennis Club, in London, Britain, 04 July 2015. EPA/GERRY PENNY

Fans cheer on Nick Kyrgios of Australia as he plays Richard Gasquet of France in their fourth round match during the Wimbledon Championships at the All England Lawn Tennis Club, in London, Britain, 06 July 2015. EPA/FACUNDO ARRIZABALAGA

Boris Becker, German coach of Novak Djokovic of Serbia, reacts during the fourth round match against Kevin Anderson of South Africa for the Wimbledon Championships at the All England Lawn Tennis Club, in London, Britain, 06 July 2015. EPA/FACUNDO ARRIZABALAGA

Britain’s Prince William, Duke of Cambridge, and his wife Catherine, Duchess of Cambridge, cheer after Andy Murray of Britain won the quarter final match against Vasek Pospisil of Canada during the Wimbledon Championships at the All England Lawn Tennis Club, in London, Britain, 08 July 2015. EPA/GERRY PENNY

Spectators brave the elements as rain delays Women’s quarter final matches during the Wimbledon Championships at the All England Lawn Tennis Club, in London, Britain, 07 July 2015. EPA/GERRY PENNY