Roger Federer had no complaints over his loss to Juan Martin del Potro and expects the former champion to take the match to Rafael Nadal in the semi-finals.
Federer had his chances and the third set was key as Del Potro claimed a 2-1 advantage thanks to a 10-8 win in a tie break.
The 2009 champion went on to win the match 7-5 3-6 7-6(10-8) 6-4 in just under three hours and Federer concedes the better man on the day won.
“I tried until the very end,” said the 19-time Grand Slam champion.
“Smashing certain stuff in the net that I normally wouldn’t, smashing forehand volleys into the back fence, I mean, that stuff sucked. Honestly, it was terrible.
“Juan Martin did well. He served well, had some big shots when he needed to. That was the part that he did so much better tonight – and that’s why he deserves to win.
“I feel I have no place in the semis and he will have a better chance to beat Rafa, to be honest.”
Federer’s revival in 2017 has been extraordinary, with two Grand Slam titles, but now Del Potro has a chance to cement his own comeback with a major success, after struggling with a succession of wrist injuries in recent years.
The world number 28 is 3.75 to win the US Open outright. Del Potro is 3.00 to win his semi-final clash with world number one Nadal, who can be backed at 1.40.