Men's and women's singles quarter-finals at US Open
LIVE: Alex de Minaur takes first set 6-4 against Felix Auger-Aliassime
Eighth seed De Minaur bidding for first Grand Slam semi-final appearance
Auger-Aliassime reached last four in New York in 2021
Winner will play either world number one Jannik Sinner or Lorenzo Musetti
Followed by: Iga Swiatek against Amanda Anisimova
Swiatek beat Anisimova 6-0 6-0 in Wimbledon final last month
Listen to live coverage on BBC Radio 5 Sports Extra (UK only)
*Auger-Aliassime 4-6 5-5 De Minaur
Russell Fuller
Tennis correspondent on BBC Radio 5 Sports Extra and BBC Sounds
De Minaur has more hard court wins than anyone else on the tour this year.
28 wins to his name - that is not a statistic to be underestimated, even if some of them came at the lower level of tournament.
*Auger-Aliassime 4-6 5-5 De Minaur
That's as good as it gets for Felix Auger-Aliassime, though.
The Canadian sends a forehand wide and Alex de Minaur hold.
We stay on serve.
Auger-Aliassime 4-6 5-4 De Minaur*
Right, so Alex de Minaur is serving to stay in the set.
Aside from being broken earlier in this set, De Minaur has looked pretty solid with the ball in hand.
The 26-year-old leads 40-0 but Felix Auger-Aliassime comes back fighting and gets to deuce.
Auger-Aliassime 4-6 5-4 De Minaur*
Mark Woodforde
17-time Grand Slam doubles champion on BBC Radio 5 Sports Extra and BBC Sounds
Auger-Aliassime certainly embraces these indoor conditions when there is no wind to deviate the ball toss, or change the toss for any sun issues.
Generally, the indoor courts play a bit quicker as well. There is some benefits to his all-round game.
Auger-Aliassime 4-6 5-4 De Minaur*
Felix Auger-Aliassime looks to be racing to a hold when he moves into a 40-0 lead but a long forehand and a double fault leave the door ajar for Alex de Minaur.
The crowd get behind the Canadian and he responds with a powerful serve down the middle that is returned into the net by De Minaur.
*Auger-Aliassime 4-6 4-4 De Minaur
Mark Woodforde
17-time Grand Slam doubles champion on BBC Radio 5 Sports Extra and BBC Sounds
De Minaur has shown a few cracks in the last few games, but Auger-Aliassime has only been able to benefit from one game.
*Auger-Aliassime 4-6 4-4 De Minaur
Image source, Getty ImagesFelix Auger-Aliassime slams a forehand into the net to trail 40-30 and he's not happy with the ball. He asks to check that it's not flat but after a couple of bounces seems satisfied.
The Canadian has dragged himself back into this set but seems to be waning mentally again.
Alex de Minaur goes on to hold.
Pastikova 6-1 3-6 4-6 Klugman
We mentioned earlier how Britain's Oliver Bonding had made it through to the junior quarter-finals - he's now been joined by compatriot Hannah Klugman, who has just reached the last eight of the girls' singles.
French Open runner-up Klugman had to come from a set down for the second match in a row, finally coming through 1-6 6-3 6-4 against Julie Pastikova of the Czech Republic.
The only other Briton left in the junior singles is defending champion Mika Stojsavljevic, who is currently on court against another Czech player, Jana Kovackova.
Auger-Aliassime 4-6 4-3 De Minaur*
Felix Auger- Aliassime is on a roll now.
He claims his eighth successive point with an ace to get the hold to love.
*Auger-Aliassime 4-6 3-3 De Minaur
Mark Woodforde
17-time Grand Slam doubles champion on BBC Radio 5 Sports Extra and BBC Sounds
It seemed like the weight of shot has paid off [for Auger- Aliassime] in the last few points.
It was a high quality return of serve followed by the forehand, which the Canadian's fan haven't seen often enough today.
After playing for an hour and a half, De Minaur's weight have shot might have dropped enough for Felix to set up the points.
*Auger-Aliassime 4-6 3-3 De Minaur
Felix Auger Aliassime takes it!
A forehand winner does the job and we're back on serve.
Where has this been from the 15th seed?
Auger-Aliassime 4-6 2-3 De Minaur*
In a repeat of what we saw in the opening set, Felix Auger-Aliassime has the chance to break back immediately.
The Canadian has two break points.
Auger-Aliassime 4-6 2-3 De Minaur*
Image source, Getty ImagesFelix Auger-Aliassime saves the first but goes long on the next point and Alex de Minaur gets the break.
*Auger-Aliassime 4-6 2-2 De Minaur
It looks like Alex de Minaur has raised those levels pretty quickly.
The eighth seed hits a beautiful volley that is returned into the net by Felix Auger-Aliassime and has two break points.
Ramphadi 2-6 3-6 Lapthorne
Britain's Andy Lapthorne has made it through to the quarter-finals of the wheelchair quad event, beating Donald Ramphadi of South Africa 6-2 6-3.
The 34-year-old from Maidenhead went out at the opening stage of yesterday's doubles, in which he and American partner David Wagner were second seeds.
But Lapthorne has quickly shaken off that disappointment to make the last eight of the singles, an event in which he has twice previously lifted the title.
*Auger-Aliassime 4-6 2-2 De Minaur
By far the scrappiest game of the match so far but it's finally over.
Alex de Minaur saved two break points but he allowed his levels to drop and was lucky Felix Auger-Aliassime didn't punish him.
Auger-Aliassime 4-6 2-1 De Minaur*
Image source, Getty ImagesAlex de Minaur just can't find a way to close this game out.
The Australian double faults and and there's a groan from the crowd.
Auger-Aliassime 4-6 2-1 De Minaur*
Felix Auger-Aliassime wastes another opportunity.
The Canadian just hasn't been able to come up with the right formula in those key moments of the match.
Auger-Aliassime 4-6 2-1 De Minaur*
But, just as was the case on two occasions in the first set, Alex de Minaur holds his nerve and saves.
De Minaur isn't out of the woods yet, though.
Auger-Aliassime 4-6 2-1 De Minaur*
Alex de Minaur is on the ropes now.
A loose backhand hands over break point.
