Del Potro sets up Federer US Open showdown

New York : Juan Martin del Potro shrugged off sickness to save two match points and defeat Dominic Thiem in a five-set US Open epic on Monday to book a quarter-final showdown with five-time champion Roger Federer.

Argentina 24th seed Del Potro claimed a heroic 1-6, 2-6, 6-1, 7-6 (7/1), 6-4 victory over the sixth-seeded Austrian on a rocking Grandstand court, describing it as night he would remember forever.

Del Potro famously defeated Federer in the 2009 final for his only career Grand Slam title before his career was almost torpedoed by a succession of wrist surgeries.

Federer, the third seed, eased into the last-eight with a 6-4, 6-2, 7-5 win over Philipp Kohlschreiber, taking his record over the German veteran to 12-0.

Elsewhere, top seed Rafael Nadal claimed his 50th win at the US Open and will meet Russian teenager Andrey Rublev.

In the women's event, world number one Karolina Pliskova set-up a quarter-final date against America's CoCo Vandeweghe.

Estonia's world number 418 Kaia Kanepi also reached the quarter-finals, just the second qualifier to make the last eight.

But the day belonged to Del Potro, who celebrated his win, which came off a Thiem double fault, by stretching out his arms, head facing the night sky, as his legion of fans, many dressed in the light blue colors of Argentina's famed football and Pumas rugby teams, celebrated wildly.

"Oh my God," said Del Potro, who had been 2-5 down in the fourth set.

"I was sick the last two days. I came here trying to play the best I can and then when I see this crowd cheering for me, I was trying to play better every game. I will always remember this."