Novak Djokovic and Andy Murray are headed for a much awaited US Open quarter-final showdown on Saturday as five-time women’s champion Serena Williams stood alone as America’s last singles title hope.
But as the heavyweights of the sport eased into the fourth round, the women’s draw was blown open again when Wimbledon champion Petra Kvitova became the fifth top-10 seed to exit in the first week.
Wimbledon champion and seven-time major winner Djokovic will next face Germany’s Philipp Kohlschreiber who ended US hopes with a 7-6 (7/4), 4-6, 7-6 (7/2), 7-6 (7/4) win over Isner.
Serena racked up her 75th victory at the US Open when she eased past her third successive American compatriot Varvara Lepchenko, 6-3, 6-3 and will tackle tough Estonian Kaia Kanepi for a quarter-final berth.
