Roger Taylor beats Marin Cilic in four sets in U.S. Open third round . The Australian Open and Wimbledon champion had only dropped three games in his first two matches , but he was given a sterner test against Davydenko , a semifinalist here in 2006 and 2007 . Federer survives upset as Croatian takes second seed at Flushing Meadows . Top seed Novak Djokovic also reaches fourth round after defeating Nikolay Davydenko . Ninth seed Tomas Beck forced to quit with a shoulder injury in New York .
Roger Taylor beats Marin Cilic in four sets in U.S. Open third round . Federer survives upset as Croatian takes second seed at Flushing Meadows . Top seed Novak Djokovic also reaches fourth round after defeating Nikolay Davydenko . Ninth seed Tomas Beck forced to quit with a shoulder injury in New York .