Juan Martin del Potro battles back for stunning victory over Dominic Thiem

Juan Martin del Potro battles back for stunning victory over Dominic Thiem

Roger Federer is coming off a straight sets win over Philipp Kohlschreiber that took 30 games to decide.

The Argentine who was unwell played an epic five-setter to overcome sixth seed Dominic Thiem 1-6, 2-6, 6-1, 7-6 (7/1), 6-4 in a match that lasted a little over four hours.

Eventually, del Potro worked his way all the way back on the strength of powerful serves and thunderous forehands to edge Thiem 1-6, 2-6, 6-1, 7-6 (1), 6-4 and set up a quarterfinal showdown against Roger Federer.

In the previous three head-to-head games, Federer recorded all three victories but they were played long ago, and the only recent match was the one in Miami.

'Then I will see if I'm ready to play in good conditions against Roger'.

"I saw the crowd waiting for more tennis and waiting for my good forehand and good serve".

Goffin's next match will be against 19-year-old Andrey Rublev of Russian Federation, who defeated Damir Dzumhur of Bosnia and Herzegovina 6-4, 6-4, 5-7, 6-4. "That's what I did with my hands, looking the sky", Del Potro said.

He's had a rough side for a lot of years with his wrist. "I fought like this because of these guys". I wanted to get it done as soon as possible so Philipp wouldn't have to wait.

The 24th seed saved two match points in the fourth with aces and the crowd went wild when Del Potro won the resulting tie-break to take it to a decider.

Federer had lost to DelPo in the final here in 2009 and he said that he knew a tough match is on the cards.

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Del Potro looked tired, laboring as Thiem dominated early.

"I wasn't really affected by the easy first two sets".

The 28-year-old was broken in the first game and seemed to be struggling with his eyesight.

The 22nd seed must try to recover for a quarter-final with 19-time grand- slam champion Federer in a rematch of their 2009 final. Fellow American Madison Keys grabbed the last four games to eliminate fourth seed Elina Svitolina 7-6 (7-2) 1-6 6-4 meaning there four USA women are in the last eight for the first time in 15 years after Venus Williams and Sloane Stephens had previously advanced.

The state of the 36-year-old Federer's physical condition has been a talking point throughout the tournament, because he tweaked his back during a match in August, interrupting his preparation for Flushing Meadows. "I don't know what can I say after this big battle".

Having been well below his best in five-set wins over Frances Tiafoe and Mikhail Youzhny in the first two rounds, Federer appeared to have shrugged off concerns over his form and fitness by easing past Feliciano Lopez.

Yesh: This is an underrated match that really could set the tone for the whole tournament.

Del Potro looked exhausted at the start of the match and called for the doctor, who gave him some pills.

The top-seeded woman had even less trouble than Nadal did Monday: 2016 runner-up Karolina Pliskova beat 91st-ranked American Jennifer Brady 6-1, 6-0.

"I feel exhausted. But we can not do magic", Del Potro said. I came here trying to play as well as I can. "He beat Rafa and me back-to-back, so I felt like he deserved it at the end".