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First up on Arthur Ashe Stadium today is men's world number two Carlos Alcaraz, who takes on 32nd seed Luciano Darderi.

Alcaraz has enjoyed another excellent year on tour, and is looking to win a second Slam of the year in New York.

The Spaniard took just one hour and 36 minutes to seal his place in the third round with a straight-set victory over Italy's Mattia Bellucci earlier this week.

After the match, he joked: "I've got to say sorry to the people. But I've got to do my job."

Win today, and the five-time Grand Slam winner will set up a winnable fourth round meeting against one of unseeded French duo Benjamin Bonzi or Arthur Rinderknech.

Rybakina continues to assert herself from the back of the court and moves ahead with another straightforward hold to 15.

Raducanu will be seriously thinking at the change of ends about what she can do to stem the flow here.

Jonathan Jurejko
BBC Sport senior tennis reporter at Flushing Meadows

Well, this has been a quality start from Elena Rybakina.

The former Wimbledon champion has used her long levers and fizzing groundstrokes to great effect, pushing Raducanu deep behind the baseline and taking time away.

Stretching Raducanu out wide on the deuce side of the court has been particularly effective.

When the Brit gets her side of the scoreboard moving, there are whoops of joy from the fans.

Raducanu gets herself on the board in the fourth game with a hold to 15. Bit of a nerve settler that one.

Servers definitely on top in the men's doubles match involving British top seeds Julian Cash and Lloyd Glasspool.

Only two of the first 26 points of the match have gone in favour of the returning team and they've got through six games in 14 minutes. Rapid stuff.

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Really impressive ball striking and shot selection from Rybakina and she consolidates that break of serve with a hold to 30.

The ninth seed is in control.

Jonathan Jurejko
BBC Sport senior tennis reporter at Flushing Meadows

Image source, BBC Sport

Being back on Louis Armstrong Stadium brings a sense of deja vu.

Raducanu is playing early again on the US Open's second show court, like she did in her opening two victories.

Actually it has proved to be a little corner of Britain.

Not only Raducanu has played here, but so too have Jack Draper and Jacob Fearnley.

Rybakina is largely dictating the points so far and she has Raducanu scurrying back and forth.

A desperate forehand at full stretch gives the Kazakh the space to pounce and there's the break of serve at the first opportunity.

Raducanu saves the first break point with a good serve before Rybakina pulls one wide and that's two of the three break points gone...

A tough start to this match for Raducanu as Rybakina pummels a couples of returns over the net and brings up three break points on the Brit's serve.

Rybakina makes a solid start with a hold to 30.

We know the Kazakh's serve is one of her biggest strengths so it will be a tough ask for the Briton to break it down.

Jonathan Jurejko
BBC Sport senior tennis reporter at Flushing Meadows

We know Emma Raducanu has star power.

Fashion mogul Anna Wintour - one of the most recognisable celebrity tennis fans - sitting in the British number one's support camp proves it.

Trademark dark shades are on for the former Vogue editor-in-chief.

Annabel Croft
Former British number one on BBC Radio 5 Sports Extra and BBC Sounds

There has been a great feeling around Raducanu in the past few weeks - the way she has upped her game and everything seems to be coming together.

She has a new coach who is extremely detailed and precise - not just technically but tactically. It seems to be going extremely well.

I don't think she could be coming into this match in better form or in a better mood.

Off we go then. A big test for British number one Raducanu up against the ninth seed Rybakina.

* denotes server

Jonathan Jurejko
BBC Sport senior tennis reporter at Flushing Meadows

This contest could come down to who serves better.

Rybakina has a metronomic serve which leads the ace count and first-serve percentage on the WTA Tour this season.

But she is not leading the serving statistics so far in New York. Instead, Raducanu is.

Raducanu is the only player through to round three to have won 100% of her service games, helped by a 78% first-serve percentage - the second-highest of the tournament.

Zero double faults - an issue which plagued Raducanu earlier this year at the Australian Open - underlines the solidity in her second serve.

Image source, BBC Sport

Somewhat surprisingly, Elena Rybakina has never gone beyond round three at the US Open.

She did, of course, win Wimbledon in 2022 and reached the final on the hard courts of the Australian Open in 2023.

Jonathan Jurejko
BBC Sport senior tennis reporter at Flushing Meadows

At Wimbledon, home favourite Emma Raducanu severely tested Aryna Sabalenka throughout the majority of a gripping contest before running out of steam.

Little over a month later, she dragged the world number one into an even tougher battle at the Cincinnati Open in a three-set match which could have gone either way.

With her service game providing a strong foundation, backed by calmness and clarity from the baseline, Raducanu's performance was further evidence she can severely test the world's best.

Like Sabalenka, the rangy Elena Rybakina relies on her power from the baseline - particularly dominating opponents with her thunderous serve.

"The match-up is different but you're still playing a power player in Rybakina," said Davenport.

"With Rybakina you get a little bit more time. If you look at the pace of shot from both players, Sabalenka is a little bit more offensive and a little bit more dominant in how early she takes her shot.

"Rybakina's A-game isn't as high as Sabalenka's but I think Raducanu will have a little bit more time off the ground.

"I think that helps her in terms of being able to build points and move Rybakina around."

Emma Raducanu heads out on to Louis Armstrong with a big smile on her face.

She looks relaxed and focussed as she takes a look around.

Warm-ups get under way.

Emma Raducanu was very impressive last time out against Indonesian qualifier Janice Tjen.

This is a whole new challenge, though, with former Wimbledon champion Elena Rybakina standing between the British number one and the fourth round.

Despite Raducanu looking very much back to her best, it is against the world's top players that there still seems to be a gap that needs bridging.

But while she ultimately fell short of beating Aryna Sabalenka at Wimbledon and the Cincinnati Open, 36th-ranked Raducanu's performances were a mark of her encouraging progress.

She has, however, still only won three of her 17 matches against top-10 players.

Rybakina might be seeded ninth in New York this year, but the recent bulldozing of Sabalenka in Cincinnati - winning 6-1 6-4 - was a reminder of her threat.

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The British interest in New York today isn't just limited to the singles.

Julian Cash and Lloyd Glasspool made history last month by becoming the first all-British pair to win the men's doubles title at Wimbledon for 89 years.

They are the top seeds at the US Open and face Austria's Alexander Erler and American Robert Galloway first on Court 10.

In the women's doubles, British duo Katie Boulter and Sonay Kartal take on Sabrina Santamaria of the United States and Tang Qianhui of China in their first-round match on Court 5.