Rafael Nadal has been thwarted in the fourth round of the US Open, beaten by Lucas Pouille in a memorable five-setter, while world number one Novak Djokovic coasted through.Displaying poise beyond his years, the 22-year-old Pouille took charge early and led two sets to one, then rebounded after sagging in the fourth set to win 6-1, 2-6, 6-4, 3-6, 7-6 (8/6) in a four-hour struggle against the fourth seed.
Playing in his third consecutive five-set match, 24th seed Pouille, still looking for his first ATP Tour title, showed that his quarter-final advance earlier this season at Wimbledon was no fluke.
"I couldn't dream better than this," he said in an on-court interview after falling flat on his back in celebration after his forehand winner ended the marathon on his fourth match point.
The marathon match pushed back the final centre-court session, but top seed Djokovic was unfazed, romping past 21-year-old Briton Kyle Edmund 6-2, 6-1, 6-4 in less than two hours.
Earlier, 10th seed Gael Monfils motored into the quarter-finals with a straight-sets win over Marcos Baghdatis.
Monfils, who has enjoyed a run of success this hard court season, maintained his impressive form with a 6-3, 6-2, 6-3 romp that kicked off a busy day for the French men's contingent at Flushing Meadows.
Monfils, playing a familiar foe, was well prepared for his round of 16 test and executed his game plan.
"He's a good friend, I know him for a long time," said the 30-year-old Monfils. "We had many battles in juniors and we have many also on the senior tour.
"I had to be very consistent with my serve because he's a pretty good returner. I was very fast on the baseline, so I guess everything was fine today."
Jo-Wilfried Tsonga was made to work for his pass to the final eight, but emerged victorious over American Jack Sock in a 6-3, 6-3, 6-7 (9/7), 6-2 win.