My word, Sebastian Korda is serving beautifully.

He's coming through his own service games with such ease right now.

The American does so again, hitting his eighth ace in just three service games to keep hold.

Over on Grandstand, two-time Wimbledon champion Petra Kvitova is a break down against Diane Parry of France in what could prove to be the final match of her career.

Kvitova has said she will retire after this year's US Open.

She has won just one match since returning to the WTA Tour in February following the birth of her first child.

Can she extend her career a bit longer or will it be farewell to a legend?

Sebastian Korda catches Cameron Norrie cold with two pretty routine winners to go love-30 up.

It's the second straight Norrie service game that the American's won the first two points.

But Norrie responds well, taking the next four points and keeping serve with a deft drop shot.

Barbora Krejcikova holds on her serve, but then can't take advantage of break point in game three.

She slices a backhand wide on break point number two, before Victoria Mboko hits a clean forehand winner to save a third break point.

A much-needed ace sets up advantage for the Canadian, before she smashes a backhand winner to keep her serve.

That could be a key moment for the 18-year-old.

Image source, Getty Images

I was just about to say that Sebastian Korda's serving has been sensational, but he's just double-faulted on game point.

The American then gets taken back to deuce on a further two occasions but two rocket forehand winners give Korda the hold.

And his serving has been sensational to be fair, with Korda hitting six aces so far.

Daniel Kiernan
Former British tennis player on BBC Radio 5 Sports Extra 2

We can already see the pattern that's going to develop in this match.

Sebastian Korda wants to get those easy points by using his big serve. He really is the cleanest ball-striker out there, so he will want to get that big first strike.

Cameron Norrie will be a bit more tenacious. He will want to make those rallies a little bit longer on Korda's serve and he is come out on top of those at the minute.

BBC Radio 5 Live

A reminder you can tune in to listen to Cameron Norrie's match against Sebastian Korda via the link at the top of this page (UK only).

Cameron Norrie drags himself out of the hole, forcing Korda into consecutive errors before firing a body shot serve that the American can't return.

The Briton's serving was well below-par there, though.

Early opportunity for Sebastian Korda....

Barbora Krejcikova makes a dream start by breaking Victoria Mboko!

Mboko makes two double faults and makes a couple of bad misses as she tries to find her stride.

The teenager did show her quality with a beautiful backhand down the line though.

Image source, Getty Images

Sebastian Korda holds to 15 in his opening service game.

A couple of aces and a forehand winner to see it out.

Good start.

* denotes next server

The American gets us under way on serve against Britain's Cameron Norrie.

Barbora Krejcikova wins the coin toss and elects to receive, meaning Victoria Mboko will serve first on Louis Armstrong Stadium.

Image source, Getty Images

Barbora Krejcikova won a second career Grand Slam singles title when she beat Jasmine Paolini in the 2024 Wimbledon final, but she has been hampered by injuries ever since.

After missing the Australian Open at the start of the year, she exited French Open in the second round before her Wimbledon defence ended in tears in the third round.

The world number 62 did beat Elina Svitolina in the Cincinnati Masters earlier this month, who is 12th seed in New York.

Image source, Getty Images

If you are unfamiliar with the name Victoria Mboko, then where have you been?

The 18-year-old Canadian has enjoyed a meteoric rise in 2025, catapulting herself from 333rd to 23rd in the world rankings with her powerful but clinical play.

Earlier this month she claimed a first career title by beating four Grand Slam winners to win her home tournament, the Canadian Open.

In doing so, she became just the third woman to win a WTA 1000 event as their first tour-level title.

She'll need to hit the ground running today as she faces 2024 Wimbledon champion Barbora Krejcikova.

Missed day one? We'll forgive you. It's the first time the US Open has started on a Sunday in the Open Era, after all.

What did you miss?

Well, Emma Raducanu needed just 62 minutes to beat Japanese qualifier Ena Shibahara 6-1 6-2 to register her quickest Grand Slam victory.

World number one Aryna Sabalenka came through in straight sets against Switzlerand's Rebeka Masarova, winning 7-5 6-1.

24-time Grand Slam champion Novak Djokovic overcame physical difficulties to beat American teenager Learner Tien 6-1 7-6 (7-3) 6-2.

Oh, and Daniil Medvedev had a mid-match meltdown at the presence of a photographer on the court, before going on to lose to Benjamin Bonzi almost two hours later 6-3 7-5 6-7 (5-7) 0-6 6-4.

We have a raft of first round matches continuing on day two.

Britain's Cameron Norrie kicks things off at around 16:00 BST when he takes on American Sebastian Korda.

In the women's draw, teenage wonderkid Victoria Mboko will be looking to build on her incredible Canadian Open success when she takes on Barbora Krejcíkova at the Louis Armstrong stadium.

World number five Jack Draper will take to court after the completion of that match, when the Briton takes on Argentine Federico Agustin Gomez.

Later, plenty of eyes will then be on 45-year-old Venus Williams as she makes her return at Flushing Meadows against 11th seed Karolina Muchova.

And then there's the small matter of five-time Grand Slam winner Carlos Alcaraz, who takes on Reilly Opelka.

It's day two of the US Open and it's a sizzling Bank Holiday.What more could you want?