Roger Federer of Switzerland returns to Andy Murray of Britain in their semi final match during the Wimbledon Championships at the All England Lawn Tennis Club, in London, Britain, 10 July 2015. EPA/FACUNDO ARRIZABALAGA

Andy Murray of Britain returns to Roger Federer of Switzerland in their semi final match during the Wimbledon Championships at the All England Lawn Tennis Club, in London, Britain, 10 July 2015. EPA/FACUNDO ARRIZABALAGA

Roger Federer of Switzerland returns to Andy Murray of Britain in their semi final match during the Wimbledon Championships at the All England Lawn Tennis Club, in London, Britain, 10 July 2015. EPA/FACUNDO ARRIZABALAGA

Roger Federer of Switzerland returns to Andy Murray of Britain in their semi final match during the Wimbledon Championships at the All England Lawn Tennis Club, in London, Britain, 10 July 2015. EPA/FACUNDO ARRIZABALAGA

Andy Murray of Britain serves to Roger Federer of Switzerland in their semi final match during the Wimbledon Championships at the All England Lawn Tennis Club, in London, Britain, 10 July 2015. EPA/FACUNDO ARRIZABALAGA

Roger Federer of Switzerland in action against Andy Murray of Britain during their semi final match for the Wimbledon Championships at the All England Lawn Tennis Club, in London, Britain, 10 July 2015. EPA/ALISTAIR GRANT

Andy Murray of Britain in action against Roger Federer of Switzerland during their semi final match for the Wimbledon Championships at the All England Lawn Tennis Club, in London, Britain, 10 July 2015. EPA/FACUNDO ARRIZABALAGA

Roger Federer of Switzerland celebrates winning against Andy Murray (R) of Britain during their semi final match for the Wimbledon Championships at the All England Lawn Tennis Club, in London, Britain, 10 July 2015. EPA/GERRY PENNY