Image source, Getty Images

This is much better from Amanda Anisimova.

The American stands strong on the baseline and Naomi Osaka puts into the net.

A rocky start. Nerves, perhaps? But Amanda Anisimova gets the hold and is on the board.

Now time to settle down.

Amanda Anisimova breaks the cycle when Naomi Osaka puts a forehand long.

A deep breath and Anisimova saves the second break point too.

OK. This is much better from the eighth seed as she gets to deuce.

Hmmm.

Further groans from the crowd as Naomi Osaka wins her 10th point in a row. You wonder how much that kind of reaction will impact American Amanda Anisimova.

Osaka picks up her 11th successive point and has three break points.

Amanda Anisimova has only played two Grand Slam semi-finals previously in her career - she reached the last four of the French Open in 2019 and made it to the Wimbledon final in July.

In contrast, Naomi Osaka has four semis under her belt - going on to win each of those four Grand Slams - and that experience might be key here.

Osaka gets the hold to love.

Image source, Getty Images

Amanda Anisimova drags a forehand wide and Naomi Osaka is off to the perfect start.

Amanda Anisimova gets to 30-0 but there's a groan from the crowd when a double fault sees Naomi Osaka draw level at 30-30.

Ah.

Break point already.

Warm-ups complete and we're ready to go under the lights on Arthur Ashe.

A reminder that world number one Aryna Sabalenka awaits the winner in Saturday's final.

Off we go...

* denotes next server

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

Anisimova was so brave against Swiatek. I think she has completely turned the whole story on her head, it's now firmly put to bed. We can now all focus on how someone has overcome such public humiliation and turned it into a positive. I think it is an extraordinary story.

Image source, Getty Images

Image source, Getty Images

Naomi Osaka's road back to the top of tennis has been gradual after taking 14 months away from the sport around the birth of daughter Shai in July 2023.

The 27-year-old said she had "nothing positive to say" after a discouraging third-round exit at Wimbledon this summer and was left questioning her direction.

But she is now preparing for a first Grand Slam semi-final appearance since she went on to win the Australian Open in 2021.

Osaka points to a change in coach - parting ways with Patrick Mouratoglou and bringing in Tomasz Wiktorowski - as one of the reasons for her upturn in form.

Wiktorowski is best known for guiding compatriot Iga Swiatek to four Grand Slam titles in a three-year stint, which ended in October.

"He seemed like such a tough guy to me but actually, when he smiles, he really is like a teddy bear," Osaka said of her new Polish coach.

"When we talk after matches, he's not harsh at all. He's, like, always very proud and encouraging.

"I feel like it kind of creates a safe space for me to be able to express myself and my tennis."

• Read more here

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

I've been enjoying watching Naomi Osaka play this tournament. When you get to this stage of the tournament you are starting to build your levels and find another gear that you need to reach to get through matches.

The music is pumping and the smoke machine is in full flow as Naomi Osaka and Amanda Anisimova walk out on Arthur Ashe.

It's so loud on court that Osaka has twice had to ask the chair umpire to repeat her instructions.

Anyway, Anisimova wins the coin toss and elects to serve once the warm-ups are done.

Russell Fuller
Tennis correspondent on BBC Radio 5 Sports Extra and BBC Sounds

On how Amanda Anisimova responded to the 6-0 6-0 Wimbledon final defeat by Iga Swiatek: "The way Anisimova has responded since Wimbledon, she went into the media room after that loss and owned it. She said very openly that she was frozen with nerves, absolutely exhausted, struggled to practice properly the day before.

"She returned to the tour quickly, and she has been playing superbly. She is one of a group of players that are capable of beating each other, and that is the joy of the women's game."

Image source, Getty Images

If you missed Amanda Anisimova's quarter-final victory over Iga Swiatek then here are some very neatly packaged highlights to get you up to speed.

Ryan Harrison
Former American tennis player on BBC Radio 5 Sports Extra and BBC Sounds

On Anisimova watching back her 6-0 6-0 Wimbledon final defeat by Swiatek the night before facing her again at the US Open: "What she chose to do worked. Everyone has a different process of how they like to heal from situations. She spoke about how she has grown from the experience, it shows that she has a great team of people around her.

"At the end of the day, you make the Wimbledon final, it's a great week regardless."

Image source, Getty Images

Amanda Anisimova said she rewatched her heavy Wimbledon final defeat by Iga Swiatek to inspire her to victory over the second seed in the US Open quarter-finals on Wednesday.

Swiatek earned a one-sided 6-0 6-0 win over Anisimova less than eight weeks ago at SW19 but the American set the record straight with a 6-4 6-3 triumph in New York earlier this week.

Anisimova, who is looking to reach a second successive Grand Slam final, revealed that she watched the highlights of that damaging defeat for first time the night before their Flushing Meadows meeting.

"I watched them [highlights] back, as painful as it was, just to see what I can avoid or what went wrong," she said.

"Then after I had to watch some good highlights to remove that from my brain!"

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

Osaka is such a rhythmical, wonderful ball-striker. Effortless too. It always looks so easy, it makes me want to pick up a racquet and try to do what she does! Always looks on balance, she changes the direction of the ball, strikes with authority.

Image source, Getty Images

Naomi Osaka and Amanda Anisimova haven't crossed paths regularly - meeting just twice previously with both of those encounters ending in victory for the American.

Anisimova came from a set down to win at the Australian Open in 2022 and needed just two sets to get the job done at the French Open later that year.

Those losses came after Japan's Osaka had picked up four Grand Slam titles, including two at the US Open.

That's a tough act to follow but on we go to the second semi-final of the night/morning...

Since 1975, Aryna Sabalenka is the sixth WTA number one to reach three or more women’s singles finals at Grand Slam events in a season:

• Martina Navratilova (1983-84, 86-87)
• Steffi Graf (1988-90, 96)
• Monica Seles (1992)
• Martina Hingis (1997)
• Serena Williams (2015-16)
• Aryna Sabalenka (2025)