Two - time champion Roger Federer reaches quarterfinals with four - set win . Swiss world No . 3 has back injury and long delay on Centre Court . Federer will next play Russian 26th seed Mikhail Youzhny in grass - court event . He has a possible semifinal against world No . 1 Novak Djokovic .
Six-time champion Roger Federer reaches quarterfinals with four-set win . Swiss world No . 3 overcomes back injury and rain delay on Centre Court . Federer will next play Russian 26th seed Mikhail Youzhny in grass-court event . He faces a possible semifinal against world No . 1 Novak Djokovic .