Images of Friday's action at Wimbledon
Novak Djokovic of Serbia hits a return to Juan Martin del Potro of Argentina during their men's semi-final tennis match at the Wimbledon Tennis Championships, in London July 5, 2013.POOL/Reuters
Novak Djokovic of Serbia hits a return to Juan Martin del Potro of Argentina during their men's semi-final tennis match at the Wimbledon Tennis Championships, in London July 5, 2013.STEFAN WERMUTH/Reuters
Novak Djokovic of Serbia falls during his men's semi-final tennis match against Juan Martin del Potro of Argentina at the Wimbledon Tennis Championships, in London July 5, 2013.SUZANNE PLUNKETT/Reuters
Juan Martin del Potro of Argentina serves to Novak Djokovic of Serbia during their men's semi-final tennis match at the Wimbledon Tennis Championships, in London July 5, 2013.STEFAN WERMUTH/Reuters
Novak Djokovic of Serbia follows through on a serve to Juan Martin del Potro of Argentina during their men's semi-final tennis match at the Wimbledon Tennis Championships, in London July 5, 2013.STEFAN WERMUTH/Reuters
Juan Martin del Potro of Argentina hits a return to Novak Djokovic of Serbia during their men's semi-final tennis match at the Wimbledon Tennis Championships, in London July 5, 2013.STEFAN WERMUTH/Reuters
Juan Martin del Potro of Argentina celebrates winning a point in his men's semi-final tennis match against Novak Djokovic of Serbia at the Wimbledon Tennis Championships, in London July 5, 2013.STEFAN WERMUTH/Reuters
Juan Martin del Potro of Argentina stretches to hit a return to Novak Djokovic of Serbia during their men's semi-final tennis match at the Wimbledon Tennis Championships, in London July 5, 2013.POOL/Reuters
Novak Djokovic of Serbia hits a return to Juan Martin del Potro of Argentina during their men's semi-final tennis match at the Wimbledon Tennis Championships, in London July 5, 2013.STEFAN WERMUTH/Reuters
Novak Djokovic of Serbia stretches to hit a return to Juan Martin del Potro of Argentina during their men's semi-final tennis match at the Wimbledon Tennis Championships, in London July 5, 2013.STEFAN WERMUTH/Reuters
Juan Martin del Potro of Argentina hits a return between his legs to Novak Djokovic of Serbia during their men's semi-final tennis match at the Wimbledon Tennis Championships, in London July 5, 2013.STEFAN WERMUTH/Reuters
Novak Djokovic of Serbia celebrates after defeating Juan Martin del Potro of Argentina in their men's semi-final tennis match at the Wimbledon Tennis Championships, in London July 5, 2013.POOL/Reuters
Juan Martin del Potro of Argentina leans on his racquet in his men's semi-final tennis match against Novak Djokovic of Serbia at the Wimbledon Tennis Championships, in London July 5, 2013.POOL/Reuters
Marion Bartoli of France trains on a practise court at the Wimbledon Tennis Championships, in London July 5, 2013.TOBY MELVILLE/Reuters
Sabine Lisicki of Germany smiles as she trains on a practise court at the Wimbledon Tennis Championships, in London July 5, 2013.TOBY MELVILLE/Reuters
Jerzy Janowicz of Poland hits a return to Andy Murray of Britain during their men's semi-final tennis match at the Wimbledon Tennis Championships, in London July 5, 2013.STEFAN WERMUTH/Reuters
Jerzy Janowicz of Poland hits a return to Andy Murray of Britain during their men's semi-final tennis match at the Wimbledon Tennis Championships, in London July 5, 2013.TOBY MELVILLE/Reuters
Andy Murray of Britain reacts to winning the third set in his men's semi-final tennis match against Jerzy Janowicz of Poland at the Wimbledon Tennis Championships, in London July 5, 2013.Reuters
Jerzy Janowicz of Poland reacts to winning the first set in his men's semi-final tennis match against Andy Murray of Britain at the Wimbledon Tennis Championships, in London July 5, 2013.SUZANNE PLUNKETT/Reuters
Andy Murray of Britain hits a return to Jerzy Janowicz of Poland during their men's semi-final tennis match at the Wimbledon Tennis Championships, in London July 5, 2013.Reuters
Jerzy Janowicz of Poland reacts in his men's semi-final tennis match against Andy Murray of Britain at the Wimbledon Tennis Championships, in London July 5, 2013.STEFAN WERMUTH/Reuters
Jerzy Janowicz of Poland sits with a towel over his head after his serve was broken in the fourth set in his men's semi-final tennis match against Andy Murray of Britain at the Wimbledon Tennis Championships, in London July 5, 2013.SUZANNE PLUNKETT/Reuters
Andy Murray of Britain (L) serves to Jerzy Janowicz of Poland during their men's semi-final tennis match at the Wimbledon Tennis Championships, in London July 5, 2013.SUZANNE PLUNKETT/Reuters
Andy Murray of Britain serves to Jerzy Janowicz of Poland during their men's semi-final tennis match at the Wimbledon Tennis Championships, in London July 5, 2013.STEFAN WERMUTH/Reuters