Up shortly inside the Arthur Ashe Stadium we have the defending men's champion Carlos Alcaraz.

He's up against world 113 Wu Yibing.

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Jessica Pegula, speaking at the Arthur Ashe Stadium after her third round victory: "It was really tough today. I always feel it is hard to play her. I never feel comfortable when I play her, even when I have won.

"I was going to have to dig deep. Glad I was able to find somewhere there in the second set to turn it around.

"She is a great player, so it was really hard. A lot of it revolves around my serve. My serve percentage was pretty bad.

"I do think she played a bit differently today to when I have played her in the past. I wasn't moving my feet up to the ball, and I was a little lazy to start off. Even in the second, I felt like I had a bit of wall after we played those two games."

On recovery during the match: "I use ice towels, eating as much as I can, drinking fluids, work on my breathing and try to calm my emotions down a little bit, so I am not wasting too much energy."

Jessica Pegula admits she was a bit "lazy" in the first set.

But the American hope goes on to face 16th seed Sorana Cirstea, who ended Italian 19th seed Jasmine Paolini's tournament.

Full quotes coming right up.

Next up on Arthur Ashe Stadium, Carlos Alcaraz continues the defence of his title.

Pat Cash
Former Wimbledon champion on BBC Radio 5 Sports Extra

Good performance.

Jessica Pegula was in all sorts of trouble in that first set.

The US Open, her home tournament, Jessica in other tournaments, goes 'Not my day today', but being the US Open and where she has been successful, she is a great fighter.

A little fist pump from Rinderknech as he makes his way to his seat for the changeover.

We're still on serve but his tennis has been better in this set - fewer errors - and he knows it. He's got good support here too.

Jessica Pegula swats a forehand down the line for 15-0, draws an error from Leylah Fernandez, and then throws in an ace.

Three match points!

Pat Cash
Former Wimbledon champion on BBC Radio 5 Sports Extra

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New balls coming out as well. They will zip through a little bit and there's a chance of unforced errors. Leylah Fernandez is going to change her racquet, which I think is a good thing.

Into the net from Jessica Pegula, and Leylah Fernandez will have one final shot at breaking the world number three to keep her hopes alive in this match.

What a time to pull that service game out of the hat.

Jessica Pegula gets up and running with an ace, and cruises to a rare love hold to move just one game away from victory.

It's been a battle, but the third seed is almost there.

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Leylah Fernandez isn't out of this yet.

The 31st seed holds from deuce to stay in touch at 4-2 as we hit the two-hour mark on Arthur Ashe Stadium.

A superb backhand winner from Jessica Pegula, who has found a much more consistent level to wrest control of this, gives her 0-30 on Leylah Fernandez's serve.

Fernandez fires back with back-to-back winners off either wing, but misses a forehand for deuce.

We remain on serve early in this second set but there was some encouraging tennis in there for Rinderknech, particularly during the third game when he came out on top of a rally at the net with a clever volley.

Pat Cash
Former Wimbledon champion on BBC Radio 5 Sports Extra

Leylah Fernandez has got to bring the margins in and go down the middle a little bit. If you're a bit short, Jessica Pegula is damaging.

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Now the crowd really believe Jessica Pegula is going to pull this off.

The 2024 finalist drives a forehand into the back of the court and Leylah Fernandez can't get enough behind her racquet to send it back in play.

The third seed is two games away from the fourth round, almost an hour and a half after she lost six of the first seven games.

Pat Cash
Former Wimbledon champion on BBC Radio 5 Sports Extra

Another solid game. Jessica Pegula continued on from the second set, which is crucial.

No lapses in concentration, which is so often easy to do. Pegula has done well.

Abigail Johnson
Commentator on BBC Radio 5 Sports Extra

That is what the best do, they turn up when it counts.

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There it is!

The world number three edges closer to a great escape on Arthur Ashe after Leylah Fernandez sends a backhand out.

After looking in control for the first half of the match, the Canadian is beginning to struggle now.

Leylah Fernandez takes a moment at the back of the court after netting to give Jessica Pegula 15-30.

The young Canadian's shoulders slump as another forehand finds the net.

Two break points. Unlike Fernandez, Pegula hasn't missed one yet...

That first break going Rinderknech's way seemed to rally Medvedev and he turns it on in the ninth game, sending a fine forehand winner down the line on his way to a second break and the chance to serve for the first set, which he does with little trouble.