"Dominic was dominating the match so easy". "I know how to play if I want to win, but I will see how physically I feel after this battle", del Potro said.
These two players are not unknown to one another.
In the third set, he used the Queens' crowd to bring him back. I'm not sure. I felt like that I left that match with a lot of regrets. I served well during the whole match.
It was a reminder of the talent that Del Potro has, and the heart and belief he has demonstrated throughout his career, from having the nerve to beat the best player in the world in your first appearance in a grand slam final, to having the drive to return to the upper echelons of the game from a career threatening injury. Thiem's best chance in the match may come in the late sets.
He saved two match points along the way, with two monster serves.
Del Potro won't have quite as many fans cheering for him on Wednesday. Why?
After taking the third set, he then trailed 5-2 in the fourth and had to save two match points.
Here's how close it was: Thiem actually won more points, 141-139. Mannarino then found himself on the net but sent a volley just wide to get broken and fall behind for the first time, 6-5.
Juan Martin del Potro staged a remarkable comeback from two sets down to beat sixth seed Dominic Thiem to reach the US Open quarter-finals.More news: Things You Can Do to Support the Victims of Hurricane Harvey
In the victory, Del Potro won 64 percent of his first serve points and 57 percent of his second serve points. Federer leads their rivalry with 16 wins to five losses but that does not seem to matter when Del Potro, the world No 28, scents history.
Ever since Del Potro won the only Grand Slam title of his career here in 2009, when he beat Rafael Nadal in the semi-finals and Federer in the final, the Argentinian has been a huge favourite with the NY public.
Rafael Nadal has insisted that the focus remain on his quarter-final clash against Andrey Rublev rather than on a potential semi-final clash against Roger Federer.
NY loves Juan Martin del Potro (pictured right) and he needed them more than ever on Monday evening at the USTA Billie Jean King National Tennis Center.
The most recent match was in this years Miami Masters, a match Federer won in straight sets. "I'm fit. I'm doing well".
Their last match was the above-mentioned final in 2009. That's what I did in the end, just keep fighting. I know him well.
Now Nadal gets to play a fifth consecutive unseeded foe in Rublev, who took out No. 9 David Goffin 7-5, 7-6 (5), 6-3.
Pliskova will next face American 20th seed CoCo Vandeweghe, who made the last eight for the first time by beating Lucie Safarova of the Czech Republic 6-4, 7-6 (7-2).
Also in the third round, Germany's Philipp Kohlschreiber advanced with a 7-5 6-2 6-4 win over Australian John Millman. She will next face either Ukrainian fourth seed Elina Svitolina or Madison Keys of the United States.
The 32-year-old Estonian is ranked 418th after missing much of the past two years with problems in the soles of both feet and a virus known as a precursor to mononucleosis.