James Waterson reports on the Wimbledon men\\u2019s quarterfinal matches. Jo-Wilfried Tsonga came back from a two-set deficit to defeat six-time Wimbledon champion Roger Federer, Novak Djokovic beat 18-year-old Bernard Tomic of Australia and needs only one more win to become the new World No. 1, and Andy Murray will face Rafael Nadal in the semifinals.'
