US Open 2026: Can Carlos Alcaraz Defend His Crown as Quarter-Final Race Intensifies?

The US Open 2026 is moving rapidly towards its second week, and defending champion Carlos Alcaraz is right where he wants to be.

The Spaniard booked his place in the fourth round on Friday with a convincing 6-3, 6-4, 6-1 victory over China’s Yibing Wu, extending his Grand Slam winning streak to 17 matches.

But the road to another title at Flushing Meadows is about to get considerably tougher.

Alcaraz’s next opponent is American Tommy Paul, who survived a five-set battle against Alexander Bublik to set up a fourth-round showdown with the defending champion. With several big names still alive across the draw, the race for the quarter-finals is beginning to take shape.

Alcaraz Looks Increasingly Comfortable in New York

There was always going to be a question mark over Carlos Alcaraz’s physical condition heading into the US Open 2026.

The 23-year-old had been sidelined for almost five months because of a wrist injury, making his return to competitive tennis in New York a significant test.

So far, the signs have been extremely encouraging.

Alcaraz opened his campaign with a straight-sets victory over Roman Safiullin before defeating Portugal’s Jaime Faria in four sets. Against Wu, however, he produced his most convincing performance yet.

The final scoreline — 6-3, 6-4, 6-1 — tells the story. Alcaraz was aggressive, moved well and steadily took control as the match progressed.

Most importantly, there have been no obvious signs that his wrist is limiting his game.

That matters enormously because Alcaraz’s biggest weapon is not simply his power. It is his ability to change pace, defend from impossible positions and immediately turn defence into attack.

After a long injury absence, every match is effectively another piece of evidence that his body is ready for the demands of a Grand Slam run.

Carlos Alcaraz vs Tommy Paul: The Next Big Test at US Open 2026

The next obstacle is Tommy Paul.

Paul earned his place in the fourth round by defeating 15th seed Alexander Bublik in a dramatic five-set contest, winning 6-4, 3-6, 6-7(4), 6-1, 6-2.

That victory is important for two reasons.

First, Paul arrives with confidence.

Second, he has considerable experience against Alcaraz.

The American trails Alcaraz 6-2 in their head-to-head record, and the Spaniard has won their last five meetings.

On paper, that makes Alcaraz the clear favourite.

But Paul has repeatedly shown that he can trouble elite opponents, particularly on hard courts. His aggressive baseline game and athletic movement can force Alcaraz to work for every point.

There is also the New York factor.

Paul will have the home crowd behind him, and against a player as explosive as Alcaraz, that emotional energy could be significant.

For Alcaraz, the objective will be simple: maintain the level he showed against Wu and avoid allowing Paul to dictate from the baseline.

The Quarter-Final Picture

The US Open 2026 draw has created the possibility of some huge quarter-final matchups.

Before the tournament began, the projected quarter-finals based on seeding were:

Alexander Zverev vs Alex de Minaur
Felix Auger-Aliassime vs Flavio Cobolli
Daniil Medvedev vs Novak Djokovic
Ben Shelton vs Carlos Alcaraz

Of course, the draw rarely follows the script.

And that is exactly what makes the second week so fascinating.

Alcaraz’s projected quarter-final opponent is Ben Shelton, although both players still have to win their fourth-round matches before that blockbuster can become reality. Shelton has already reached the fourth round after defeating Denis Shapovalov.

A potential Alcaraz-Shelton clash would offer a fascinating contrast.

Shelton brings huge serving and explosive left-handed power. Alcaraz brings variety, movement and the ability to turn defence into offence almost instantly.

It could be one of the most entertaining matches of the tournament if it materialises.

Medvedev and Tiafoe Could Create Another Blockbuster

Elsewhere in the draw, Daniil Medvedev is quietly building his own campaign.

The 2021 champion defeated Arthur Rinderknech in straight sets to reach the fourth round, where he is scheduled to meet Frances Tiafoe.

That is a serious test for both players.

Tiafoe is one of the most dangerous performers at the US Open. The American thrives on the energy of the New York crowd and arrives after reaching the Cincinnati final during the hard-court summer.

Medvedev, meanwhile, possesses the experience of having already won the tournament and knows exactly what it takes to survive the two-week grind.

The winner would then have Novak Djokovic waiting as the projected quarter-final opponent.

That side of the draw could therefore produce one of the tournament’s defining stories.

Can Anyone Stop Alcaraz?

The biggest question surrounding the US Open 2026 is whether Alcaraz can stay healthy and maintain this level through the second week.

His return has already exceeded the most basic expectations.

He has reached the last 16 without dropping a match since returning from injury, and his Grand Slam winning streak now stands at 17.

But the level of opposition is about to rise sharply.

Tommy Paul represents the immediate challenge.

Ben Shelton could be waiting in the quarter-finals.

Beyond that, the draw potentially leads towards Djokovic, Medvedev or another elite contender.

Alcaraz will also have to manage the physical demands of playing five-set matches deep into a Grand Slam after spending months away from competitive tennis.

That is where the difference between reaching the second week and actually winning the tournament becomes enormous.

The Women’s Draw Is Heating Up Too

While Alcaraz dominates much of the conversation around the men’s tournament, the women’s side is developing its own compelling storyline.

Defending champion Aryna Sabalenka has also reached the last 16 after defeating Kamilla Rakhimova 6-3, 6-4.

The Belarusian is chasing a third consecutive US Open title, adding another layer of intrigue to the women’s competition.

Jessica Pegula has also advanced, while Wimbledon champion Linda Noskova has reached the fourth round for the first time at the US Open.

That means both singles draws are entering the stage where the tournament favourites have less room for error.

Who Looks Best Positioned for the Second Week?

On the men’s side, Alcaraz has arguably made the strongest statement among the remaining contenders.

His comeback was always going to be watched closely, but the defending champion has looked increasingly comfortable with every match.

Still, “favourite” does not mean “guaranteed.”

Tommy Paul has the game to make the fourth round uncomfortable. Shelton presents a potential quarter-final danger. Djokovic remains one of the greatest big-match players in tennis history, while Medvedev knows exactly how to win at Flushing Meadows.

And then there are the Americans.

With Ben Shelton and Frances Tiafoe progressing, plus several other home players still alive, the New York crowd has plenty to get excited about.