Olympic gold medallist Belinda Bencic continued her stellar summer by defeating Iga Swiatek to reach the quarter-finals of the US Open.

After failing to serve out the opening set, the Swiss 11th seed came out on top of a 26-point tie-break and maintained her record of not having dropped a set all tournament with a 7-6 (12) 6-3 victory.

Flushing Meadows has been Bencic's most successful grand slam venue and this is the third time she has reached the last eight, with her best result a semi-final run two years ago.

Swiatek is the only woman to reach at least the fourth round at each slam this year but the French Open is the only tournament where she has gone further.

British teenager Emma Raducanu continued her dream run by overwhelming American Shelby Rogers 6-2 6-1 to reach her first Grand Slam quarter-final.

Going through qualifying to get to the last eight at a major is a stunning accomplishment by itself, but the 18-year-old has done it without dropping a set.

Raducanu, who burst onto the scene in July by reaching the fourth round at Wimbledon on her Grand Slam debut, has gone one better at the US Open in dominant fashion.

After a 6-0 6-1 hammering of Sara Sorribes Tormo in the previous round, Raducanu was nearly as ruthless against Rogers as she dispatched the last American remaining in the women's draw in 66 minutes.

In her on-court interview, Raducanu said: "It feels absolutely amazing. Shelby is a great opponent, she's done so well in the US Open and she's had a great week so I knew it was going to be a tough match but I'm so happy to have come through and have managed to overcome some of the nerves at the beginning."

Emma Raducanu celebrates her victory

Fourth-seeded Karolina Pliskova mounted a strong defensive effort to send Russian Anastasia Pavlyuchenkova packing 7-5 6-4, keeping on track her bid for a maiden major title.

The Wimbledon runner-up fired off seven forehand winners and converted on break point in the final game in the first set, before fending off six of Pavlyuchenkova's seven break point opportunities in the second set inside the Grandstand.

The Czech had lost in the pair's previous two encounters - in Madrid this year and at the 2020 Australian Open - but would not be denied a fourth trip to the U.S. Open quarter-final as she came out on top in a 14-shot rally on the second-to-last point before breaking Pavlyuchenkova's serve to close out the match.

The world number four has put up an astonishing 58 aces so far at Flushing Meadows this year, by far the most of any of the remaining players, and next faces either Greek Maria Sakkari or Canadian Bianca Andreescu in the quarter-final.

World number 18 Maria Sakkari ended the resurgence of former champion Bianca Andreescu to reach the last eight in a gripping late-night encounter.

The Greek prevailed 6-7 (2) 7-6 (6) 6-3 after a gruelling three-hour, 30-minute battle at Flushing Meadows on Tuesday morning that ended at 2.13am local time.

Andreescu, the 2019 champion, had been on a 10-match winning streak after returning to form following a series of problems with injury and illness.

The Canadian took the first set despite a number of unforced errors but Sakkari responded to edge a second set notable for four consecutive breaks of serve.

A new record for the latest women's singles finish at the US Open was then set as the match stretched on and it was Sakkari who triumphed after Andreescu received treatment for a leg problem.