Listen to commentaries from Southampton & Newcastle on this page
FT: Newcastle 3-1 Brentford - Tonali with double and Schar on target
FT: Southampton 1-2 Liverpool - Nunez slots in before Elliott second, but Archer gave Saints hope
FT: Arsenal 3-2 Crystal Palace - Jesus scores hat-trick as Gunners come from behind
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Who will be joining Arsenal, Liverpool and Newcastle in the semi-finals?
Tottenham host Manchester United in the fourth and final quarter-final on Thursday (20:00 GMT).
The draw for the semi-finals takes place after that.
The two-legged semi-finals take place on the week commencing 6 January and 3 February, with this season's final at Wembley on 16 March.
FT: Southampton 1-2 Liverpool
Liverpool can prepare for Tottenham away on Sunday having rested Mohamed Salah and Virgil van Dijk. In addition, Trent Alexander-Arnold was replaced at the start of the second half.
Arne Slot will also be back on the touchline at the Tottenham Hotspur Stadium.
FT: Southampton 1-2 Liverpool
Francis Benali
Former Southampton defender on BBC Radio 5 Sports Extra
Changes have worked well for Liverpool. They have given minutes and legs to those players who would not have been playing normally. There were some good performances from their players.
There are a lot of positives they will take home from tonight and not just from progressing in the competition.
FT: Southampton 1-2 Liverpool
Top of the Premier League. Top of the Champions League. And into the semi-finals of the League Cup.
It's now 20 wins from 24 games in all competitions for Arne Slot in his first season in charge of Liverpool.
What a start!
Southampton 1-2 Liverpool
Image source, Getty ImagesThe holders are through but that was much better by Southampton.
Southampton 1-2 Liverpool
Cleared. Liverpool power forward and Darwin Nunez drills wide.
Southampton 1-2 Liverpool
Southampton are on the attack...
Southampton 1-2 Liverpool
Francis Benali
Former Southampton defender on BBC Radio 5 Sports Extra
My reaction was it was a foul on Mateus Fernandes. It certainly looked like it from our position here.
He does get in front of Jarell Quansah. It is one of those decisions that could have easily gone either way.
Southampton 1-2 Liverpool
Into the final minute. Now or never for Southampton.
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Image source, Getty ImagesPositives for Southampton tonight, 1st time in weeks we haven't looked rubbish.
Jasper in Verwood
Southampton 1-2 Liverpool
This is edge of your seat stuff!
Boos all around St Mary's as Simon Hooper waves away home appeals for a penalty after Mateus Fernandes goes down after a challenge by Jarell Quansah.
Liverpool are living dangerously.
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Hahaha wonderful nonsense about on here Chiesa who hasn't started a game for months and is nowhere near fully fit.
Dan, London
Southampton 1-2 Liverpool
Southampton fans are roaring their team forward.
This has been a much better second half performance but they running out of time.
Southampton 1-2 Liverpool
Francis Benali
Former Southampton defender on BBC Radio 5 Sports Extra
It's been more direct attacks from Southampton in this second half. The tempo and pace of the game has certainly picked up as we approach the closing stages. It's been more of a cup tie.
Southampton 1-2 Liverpool
A minimum of six added minutes.
Just before the board went up, Federico Chiesa had a chance to seal it for Liverpool. His attempt was blocked.
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Chiesa is stealing a living at Liverpool. Dreadful.
Scudgie
Chiesa has my vote for our worst import in the last decade. He’s absolutely useless and can’t even get the ball under control. Harvey Elliot is screaming at him. What a waste of a shirt number the guy is. Ciao Chiesa.
Jay
Southampton 1-2 Liverpool
A cross into the Liverpool box is inch-perfect for substitute Ben Brereton Diaz but he heads straight at the keeper.
Would it have counted? The offside flag was up.
Southampton 1-2 Liverpool
Arsenal are through. Newcastle are through. Liverpool are two minutes plus stoppages away from joining them in the semi-finals.
But here come Southampton...
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Image source, Getty ImagesOnuachu looks like Bambi on ice at times.
Nick, Ashover
Southampton 1-2 Liverpool
Remember Jayden Danns, the 18-year-old who helped Liverpool beat Chelsea in the final at Wembley last season?
He's just come on with four minutes of normal time remaining.
