Naomi Osaka in superb form to beat third seed Coco Gauff 6-3 6-2 and reach first Grand Slam quarter-final since 2021
Wimbledon champion Iga Swiatek beats 13th seed Ekaterina Alexandrova 6-3 6-1 on Louis Armstrong Stadium
Felix Auger-Aliassime beats Andrey Rublev 7-5 6-3 6-4 to reach last eight
Alex de Minaur beats qualifier Leandro Riedi 6-3 6-2 6-1 to book quarter-final tie with Auger-Aliassime
Defending men's champion Jannik Sinner plays Alexander Bublik in night session
Osaka v Gauff
A very tasty match up next on Arthur Ashe as the 2023 champion takes on the two-time champion.
The players are just heading out to court so stick with us for all the latest updates from that one.
Mark Woodforde
17-time Grand Slam doubles champion on BBC Radio 5 Sports Extra and BBC Sounds
Image source, Getty ImagesThere was no doubt for Felix Auger-Aliassime when reaching his first quarter-finals at the US Open back in 2021 - he probably thought it was going to continue, and then he ran into some trouble physically.
But now, there's nothing sweeter or better the second time round.
It's not to say he'll repeat this at the Australian Open in January, but it helps for him to reset and realise he's had to push himself and persevere and deal with those setbacks.
It's been an impressive display, it's synchronising here thus far for him at the US Open.
Alexandrova 3-6 1-6 Swiatek
Ekaterina Alexandrova earns herself three break points, which do at least extend the match beyond the hour mark.
But Swiatek negotiates all of them, and then wraps up victory with yet another backhand winner.
It has been a dominant display from the world number two.
Auger-Aliassime 7-5 6-3 6-4 Rublev
More from Felix Auger-Aliassime after beating Andrey Rublev...
On his meditation routine:
"It's very important for me, it's something I've added in the last couple of years. In those tight moments you want to come on the court in the right state of mind.
"There's a lot of excitement in our world today, but on the court we need to be calm-headed, especially in the pressure moments. For me it's a routine I have before matches and it helps to calm me down."
On his upcoming wedding:
"Maybe if I make the final on Sunday, I will have to postpone the suit fitting [on Monday]!"
Auger-Aliassime 7-5 6-3 6-4 Rublev
Felix Auger-Aliassime speaking after beating Andrey Rublev:
"Thank you all for coming. Today is my first time playing on Arthur Ashe in a few years. It feels even better than the first time. The first time at 21, I was on my way up.
"To have a few setbacks, injuries, struggle with confidence, to come back the second time to the quarter-finals, it feels much better and more deserved. I'm soaking up every moment here."
On overcoming a 1-7 win-loss record against Rublev:
"I've played good in the past against Andrey, but I kept my cool and remained calm and poised to finish the match, that was the key.
"I've had many tough matches with Andrey in the past, it was always a battle, sometimes I would be up and serving for the match, but he would come back."
*Alexandrova 3-6 1-5 Swiatek
Ekaterina Alexandrova has hit a few quality winners but she is just being overwhelmed by the relentless intensity of Iga Swiatek, who has been at the top of her game this afternoon.
A fourth double fault from Alexandrova sees her lose her serve again, and Swiatek will be serving for the match, with less than an hour played.
Mark Woodforde
17-time Grand Slam doubles champion on BBC Radio 5 Sports Extra and BBC Sounds
Incredible.
That was some of the best tennis from Felix Auger-Aliassime against a quality opponent - to win it in straight sets as well.
It's not like he was given the match - he went out and he won that match.
*Alexandrova 3-6 1-4 Swiatek
Iga Swiatek's lightning-quick returns are continuing to rush Ekaterina Alexandrova and the latter puts two consecutive forehands wide to hand Swiatek the break.
That break is consolidated when she goes on to hold serve.
The world number two is now firmly on course for the quarter-finals.
Image source, Getty ImagesAuger-Aliassime 7-5 6-3 6-4 Rublev
That's outstanding!
Felix Auger-Aliassime wins it with a stunning backhand winner along the line and takes his place in the quarter-finals.
The Canadian has not reached the quarter-finals in New York since 2021, when he went all the way to the semi-finals.
*Auger-Aliassime 7-5 6-3 5-4 Rublev
A forehand winner, an ace, and another forehand winner.
Felix Auger-Aliassime has three match points.
*Alexandrova 3-6 1-2 Swiatek
Iga Swiatek looks dialled in, pumping her fist as she wrong-foots Ekaterina Alexandrova.
Her backhand is really firing, and she flashes another to earn a break point but Alexandrova manages to keep her at bay.
But the 13th seed can't make any headway on her opponent's serve. Swiatek hasn't faced a break point since her opening service game of the match, and a couple of aces help her to another comfortable hold.
Mark Woodforde
17-time Grand Slam doubles champion on BBC Radio 5 Sports Extra and BBC Sounds
The question is does Felix Auger-Aliassime go searching to finish the game here, given he's had those moments of hiccups in the past?
*Auger-Aliassime 7-5 6-3 5-4 Rublev
Anything you can do...
Andrey Rublev holds to love with two aces.
Felix Auger-Aliassime looked like he was saving himself for what could be his final service game.
Up he comes to serve for a place in the quarter-finals.
Auger-Aliassime 7-5 6-3 5-3 Rublev*
As if he just read our last post, Felix Auger-Aliassime holds to love to edge closer to the quarter-finals.
Image source, Getty Images*Auger-Aliassime 7-5 6-3 4-3 Rublev
We don't want to tempt fate here, but Felix Auger-Aliassime has lost five matches in his career from leading two sets to love.
The Canadian doesn't look like he'll let that happen today, but surely it must be in the back of his mind.
*Auger-Aliassime 7-5 6-3 4-3 Rublev
Felix Auger-Aliassime comes back from 40-0 to 40-30, but Rublev wins the next point to hold his serve.
Image source, Getty ImagesAuger-Aliassime 7-5 6-3 4-2 Rublev*
Felix Auger-Aliassime is killing Andrey Rublev with his serves at the moment.
With an average serve speed of over 120mph, Rublev is struggling to do anything constructive with his returns.
To hammer home the point, Auger-Aliassime takes the game with his 11th ace of the day.
Image source, Getty Images*Alexandrova 3-6 0-1 Swiatek
Iga Swiatek jogs out from her chair to begin the second set but she has to wait for Ekaterina Alexandrova to reach her end.
That was the first time Alexandrova has dropped a set at this US Open - how will she react?
For her part, Swiatek clearly wants to get this match wrapped up quickly, and she holds to take an early lead in the second set.
BBC Radio 5 Sports Extra
BBC Radio 5 Sports Extra has live commentary of day nine in New York. Coverage is also available via BBC Sounds or by clicking the link at the top of this page.
*Auger-Aliassime 7-5 6-3 3-2 Rublev
Felix Auger-Aliassime is locked in, but so is Andrey Rublev.
The Russian responds to a superb Auger-Aliassime return with two straight aces and holds. He needs to break soon though to save his US Open.
Image source, Getty Images
