Tomas Berdych of the Czech Republic serves to Novak Djokovic of Serbia in their men's quarter-final tennis match at the Wimbledon Tennis Championships, in London July 3, 2013.EDDIE KEOGH/Reuters
Novak Djokovic of Serbia hits a return to Tomas Berdych of the Czech Republic during their men's quarter-final tennis match at the Wimbledon Tennis Championships, in London July 3, 2013.EDDIE KEOGH/Reuters
Novak Djokovic of Serbia hits a return to Tomas Berdych of the Czech Republic during their men's quarter-final tennis match at the Wimbledon Tennis Championships, in London July 3, 2013.SUZANNE PLUNKETT/Reuters
Novak Djokovic of Serbia slips during his men's quarter-final tennis match against Tomas Berdych of the Czech Republic at the Wimbledon Tennis Championships, in London July 3, 2013.SUZANNE PLUNKETT/Reuters
Tomas Berdych of the Czech Republic (TOP) prepares to serve to Novak Djokovic of Serbia in their men's quarter-final tennis match at the Wimbledon Tennis Championships, in London July 3, 2013.SUZANNE PLUNKETT/Reuters
Spectators sit on court one at the Wimbledon Tennis Championships, in London July 3, 2013.EDDIE KEOGH/Reuters
David Ferrer of Spain serves to Juan Martin del Potro of Argentina during their men's quarter-final tennis match at the Wimbledon Tennis Championships, in London July 3, 2013.TOBY MELVILLE/Reuters
Juan Martin del Potro of Argentina receives medical attention during his men's quarter-final tennis match against David Ferrer of Spain at the Wimbledon Tennis Championships, in London July 3, 2013.STEFAN WERMUTH/Reuters
David Ferrer of Spain hits a return to Juan Martin del Potro of Argentina during their men's quarter-final tennis match at the Wimbledon Tennis Championships, in London July 3, 2013.STEFAN WERMUTH/Reuters
David Ferrer of Spain reacts during his men's quarter-final tennis match against Juan Martin del Potro of Argentina at the Wimbledon Tennis Championships, in London July 3, 2013.TOBY MELVILLE/Reuters
Juan Martin del Potro of Argentina reacts during his men's quarter-final tennis match against David Ferrer of Spain at the Wimbledon Tennis Championships, in London July 3, 2013.STEFAN WERMUTH/Reuters
David Ferrer of Spain hits an overhead smash to Juan Martin del Potro of Argentina during their men's quarter-final tennis match at the Wimbledon Tennis Championships, in London July 3, 2013.STEFAN WERMUTH/Reuters
Juan Martin del Potro of Argentina reacts after hitting the ball into the net after a rally in his men's quarter-final tennis match against David Ferrer of Spain at the Wimbledon Tennis Championships, in London July 3, 2013.STEFAN WERMUTH/Reuters
Fernando Verdasco of Spain hits a return to Andy Murray of Britain during their men's quarter-final tennis match at the Wimbledon Tennis Championships, in London July 3, 2013.STEFAN WERMUTH/Reuters
Andy Murray of Britain hits a return to Fernando Verdasco of Spain during their men's quarter-final tennis match at the Wimbledon Tennis Championships, in London July 3, 2013.STEFAN WERMUTH/Reuters
Fans of Andy Murray of Britain sit on Centre Court at the Wimbledon Tennis Championships, in London July 3, 2013.STEFAN WERMUTH/Reuters
Fernando Verdasco of Spain hits a backhand shot in his men's quarter-final tennis match against Andy Murray of Britain at the Wimbledon Tennis Championships, in London July 3, 2013.TOBY MELVILLE/Reuters
Andy Murray of Britain reacts in a rest break after the second set during his men's quarter-final tennis match against Fernando Verdasco of Spain at the Wimbledon Tennis Championships, in London July 3, 2013.STEFAN WERMUTH/Reuters
Spectators wearing Andy Murray of Britain masks on Murray Mound watch on the big screen the men's quarter-final tennis match between Murray and Fernando Verdasco of Spain at the Wimbledon Tennis Championships, in London July 3, 2013.Reuters
Jerzy Janowicz of Poland serves to Lukasz Kubot of Poland during their men's quarter-final tennis match at the Wimbledon Tennis Championships, in London July 3, 2013.EDDIE KEOGH/Reuters
Jerzy Janowicz of Poland hits a return to Lukasz Kubot of Poland during their men's quarter-final tennis match at the Wimbledon Tennis Championships, in London July 3, 2013.EDDIE KEOGH/Reuters