NEW YORK, United States (AFP) — Carlos Alcaraz surged into the quarter-finals of the US Open on Monday as upsets dominated the women’s draw, with Ons Jabeur and Jessica Pegula becoming the latest highly ranked players to go crashing out.

Defending champion Alcaraz, who has only dropped one set on his journey into the last eight, produced a dominant display to overwhelm Italian world number 61 Matteo Arnaldi, winning 6-3, 6-3, 6-4 in one hour and 57 minutes.

The 20-year-old Alcaraz is bidding to become the first man since Roger Federer in 2008 to successfully defend the US Open after winning the title for the first time last year.

The identity of the Spaniard’s quarter-final opponent will be confirmed later Monday, with Alcaraz due to face either Germany’s Alexander Zverev or Italy’s sixth seed Jannik Sinner in the last eight on Wednesday.

A match with Sinner would be a repeat of last year’s quarter-final classic between the two men, which set a record as the latest-ever finish for a US Open game after wrapping up at 2:50 am.

“I think the intensity from the beginning until the last ball, I played a really solid match, less mistakes,” Alcaraz said after Monday’s brisk victory.

“I’m really happy with the performance in general.”

In other men’s matches on Monday, eighth-seeded Russian Andrey Rublev advanced with a 6-3, 3-6, 6-3, 6-4 defeat of Britain’s Jack Draper.

Rublev will face the winner of Monday’s later game between Russian third seed Daniil Medvedev, the 2021 champion, or Australian 13th seed Alex de Minaur.

In the women’s draw, meanwhile, more seeds bit the dust a day after world number one and defending champion Iga Swiatek was sent packing in the fourth round.

American third seed Jessica Pegula was routed in straight sets by compatriot and close friend Madison Keys, while Tunisia’s fifth seed Jabeur — beaten in last year’s final — was ousted 6-2, 6-4 by China’s Zheng Qinwen.

Pegula had gone into the US Open dreaming of a first-ever Grand Slam, buoyed by victory in last month’s WTA 1000 Canadian Open.

But the 29-year-old’s campaign came to an abrupt halt in front of a packed Arthur Ashe Stadium as 2017 US Open finalist Keys recorded a dominant 6-1, 6-3 win in just 61 minutes.

Pegula was left with no answer as Keys unleashed a stream of 21 winners to her six.

Keys also punished her friend’s shaky serve, breaking her five times on her way to wrapping up a comfortable victory.

The 17th-seeded Keys will now face Wimbledon champion Marketa Vondrousova of the Czech Republic in the quarter-finals on Wednesday.

Ninth seed Vondrousova booked her place in the last eight with a battling win over unseeded American Peyton Stearns, coming from a set down to win 6-7 (3/7), 6-3, 6-2.

Vondrousova made history in July after becoming the first unseeded woman to win Wimbledon, her first Grand Slam title.

The 24-year-old has never been past the fourth round at the US Open and admitted after her win on Monday she had surprised herself by advancing to the last eight.

Jabeur, meanwhile, who has been struggling with flu since arriving in New York, finally saw her luck run out after scrapping her way to three-set victories in her previous two games.

The Tunisian simply had no answer to 23rd seed Zheng’s blend of power and precision, with the 20-year-old from Shiyan looking far sharper than her weary opponent.