Jennifer Bate (L), girlfriend of Great Britain’s Marcus Willis, celebrates with unidentified friends during the second round match against Roger Federer of Switzerland at the Wimbledon Championships at the All England Lawn Tennis Club, in London, Britain, 29 June 2016. EPA/PETER KLAUNZER

Belinda Bencic of Switzerland returns to Tsvetana Pironkova of Bulgaria during their first round match at the Wimbledon Championships at the All England Lawn Tennis Club, in London, Britain, 29 June 2016 EPA/FACUNDO ARRIZABALAGA

David Ferrer of Spain during his second round match against Nicolas Mahut of France at the Wimbledon Championships at the All England Lawn Tennis Club, in London, Britain, 29 June 2016 EPA/HANNAH MCKAY

Supporters of Roger Federer of Switzerland before his second round match against Marcus Willis of Great Britain at the Wimbledon Championships at the All England Lawn Tennis Club, in London, Britain, 29 June 2016 EPA/FACUNDO ARRIZABALAGA

Alexander Zverev of Germany walks off court as his match against Paul-Henri Mathieu of France was was interrupted by rain during the Wimbledon Championships at the All England Lawn Tennis Club, in London, Britain, 29 June 2016. EPA/GERRY PENNY