Switzerland's Roger Federer returns against Czech Republic's Tomas Berdych during their men's singles semi-final match on the eleventh day of the 2017 Wimbledon Championships at The All England Lawn Tennis Club in Wimbledon, southwest London, on July 14, 2017. / AFP PHOTO / POOL / Tim IRELAND / RESTRICTED TO EDITORIAL USE        (Photo credit should read TIM IRELAND/AFP via Getty Images)