Jo-Wilfried Tsonga of France returns to Albert Ramos-Vinolas of Spain in their second round match during the Wimbledon Championships at the All England Lawn Tennis Club, in London, Britain, 02 July 2015. EPA/GERRY PENNY

Agnieszka Radwanska of Poland in action against Ajla Tomljanovic of Australia during their second round match for the Wimbledon Championships at the All England Lawn Tennis Club, in London, Britain, 02 July 2015. EPA/ANDY RAIN

Roger Federer of Switzerland returns to Sam Querry of USA in their second round match during the Wimbledon Championships at the All England Lawn Tennis Club, in London, Britain, 02 July 2015. EPA/FACUNDO ARRIZABALAGA

Dustin Brown of Germany returns to Rafael Nadal of Spain in their second round match during the Wimbledon Championships at the All England Lawn Tennis Club, in London, Britain, 02 July 2015. EPA/FACUNDO ARRIZABALAGA

Rafael Nadal of Spain plays Dustin Brown of Germany in their second round match during the Wimbledon Championships at the All England Lawn Tennis Club, in London, Britain, 02 July 2015. EPA/FACUNDO ARRIZABALAGA