Switzerland's Federer is hit by a ball during their Davis Cup World Group play-off tennis double match...
Switzerland's Roger Federer (R) is hit by a ball next to Marco Chiudinelli during their Group play-off tennis double match against Matwe Middelkoop and Theimo de Bakker of the Netherlands at the Palexpo Arena in Geneva, Switzerland September 19, 2015. REUTERS/Denis Balibouse