Jessica Pegula will face Aryna Sabalenka in the US Open final on Saturday
American Pegula came back from a set and a break down to beat Karolina Muchova
It is a first major singles final for sixth seed Pegula
World number two Sabalenka earlier beat Emma Navarro 6-3 7-6 (7-2)
Two-time Australian Open champion Sabalenka is into New York final for a second year in a row
Listen to live radio commentary from 5 Sports Extra at top of page (UK only)
Sabalenka 6-3 5-4 Navarro*
Image source, Getty ImagesThe writing looked to be on the wall but Emma Navarro is refusing to accept her fate here.
The American slots a forehand into the corner to earn two break points.
*Sabalenka 6-3 5-4 Navarro
The pressure might be on for Emma Navarro but she shows no signs of wilting under the bright lights with a hold to 15.
Over to Aryna Sabalenka to serve for the match and spot in the final.
Sabalenka 6-3 5-3 Navarro*
Wow.
A remarkable cross-court forehand from the baseline gets the crowd going on Arthur Ashe as Emma Navarro shows what she is really capable of.
They are quickly silenced, though, with Aryna Sabalenka winning the following two points to hold.
Navarro will serve to stay in this match.
*Sabalenka 6-3 4-3 Navarro
Emma Navarro looks deep in thought at the change of ends.
She's playing some good tennis at times but Aryna Sabalenka is just so consistent.
*Sabalenka 6-3 4-3 Navarro
Jeff Tarango
Former American tennis player on BBC Radio 5 Sports Extra and BBC Sounds
Image source, Getty ImagesEmma Navarro is a little more bouncy after that hold.
She couldn't afford to lose that game.
*Sabalenka 6-3 4-3 Navarro
A couple of unforced errors from Aryna Sabalenka allows Emma Navarro to hold.
That is huge.
*Sabalenka 6-3 4-2 Navarro
Emma Navarro continues to show a fighting spirit, though.
We're at deuce as Navarro's forehand to the baseline is returned wide by Sabalenka.
Another wayward shot from Sabalenka hands advantage to Navarro but the 2023 US Open finalist turns up the aggression to get it back to deuce.
*Sabalenka 6-3 4-2 Navarro
Aryna Sabalenka is putting her foot on the gas now and moves into a 0-30 lead before firing long to invite Emma Navarro back into the game.
Hmmm.
An unforced error from Navarro and Sabalenka has break point.
Sabalenka 6-3 4-2 Navarro*
Jeff Tarango
Former American tennis player on BBC Radio 5 Sports Extra and BBC Sounds
This is the part of the tournament where experience matters.
Aryna Sabalenka has been at this stage so many times.
Emma Navarro is just trying her hardest.
Sabalenka 6-3 4-2 Navarro*
Image source, Getty ImagesA key game now after that break.
Can Emma Navarro hit back or will Aryna Sabalenka take a huge stride towards Saturday's final?
It's the latter as Sabalenka holds to 15.
*Sabalenka 6-3 3-2 Navarro
Emma Navarro has her back against the wall again as she's unable to return Aryna Sabalenka's backhand.
Sabalenka smells blood and makes the most of her opportunity to break.
*Sabalenka 6-3 2-2 Navarro
Aryna Sabalenka continues building momentum to take the first two points against serve.
Pressure on for Emma Navarro but she responds well to get back to 30-30.
There's a bloke yawning in the crowd - it's only 20:10 in the New York!
Sabalenka 6-3 2-2 Navarro*
Jeff Tarango
Former American tennis player on BBC Radio 5 Sports Extra and BBC Sounds
Image source, Getty ImagesI think if Aryna Sabalenka wins this one, she will win the tournament but Emma Navarro is going to make her think about it, she's going to make her work, she's going to tire her out, she's going to do whatever she has to do to make this second set a contest.
It is Navarro's job to extend the match as long as she can to see if Sabalenka will give us a hiccup.
Sabalenka 6-3 2-2 Navarro*
Aryna Sabalenka picks up her first hold to love in this match.
*Sabalenka 6-3 1-2 Navarro
Image source, Getty ImagesA rare unforced error from Aryna Sabalenka now puts Emma Navarro on the verge of holding.
Navarro laps up the opportunity to take the game, moving Sabalenka deep into the corner before stepping up to the net and nestling a backhand into the opposite corner.
Fine work.
Sabalenka 6-3 1-1 Navarro*
Emma Navarro is really trying to take the match to Aryna Sabalenka but too many unforced errors are proving costly.
The American, trailing 40-30, steps forward to strike a forehand and it's got way too much on it.
Sabalenka holds and Navarro walks back to the baseline with a look of frustration etched across her face.
*Sabalenka 6-3 0-1 Navarro
Image source, Getty ImagesA big opportunity for Emma Navarro to wipe the slate clean as she starts on serve.
The American doesn't seem to be dwelling on conceding that first set as she holds to love.
That has to be huge for the morale.
Sabalenka 6-3 Navarro*
Annabel Croft
Former British number one on BBC Radio 5 Sports Extra and BBC Sounds
It was swift, 35 minutes to close out that first set. This is a pacey match.
Aryna Sabalenka steadied the ship after the unforced errors. She has got overwhelming power in all departments.
No matter that Emma Navarro defends extremely well and certainly gave the crowd something to cheer about, it just wasn't enough.
Sabalenka 6-3 Navarro*
Image source, Getty ImagesOh! The net cord is not Emma Navarro's friend here and Sabalenka has two set points.
Navarro hooks well wide via the edge of her racquet to hand the set to the Belarusian.
Sabalenka 5-3 Navarro*
A chance for Aryna Sabalenka to serve for the set then.