City can't get Julian Alvarez into the game at all. He's had one touch in the Saints box.

Cole Palmer has the ball on the edge of the box and 20 seconds later the ball is back with his keeper. They just can't find a way through.

Southampton really have been excellent here, top marks to Nathan Jones' side. Phil Foden gets the ball and is squeezed out by three Saints, who immediately get a quick counter-attack going.

Simon Stone
BBC Sport at the City Ground

News of the score at Southampton was read out over the tannoy when the half-time whistle blew.

The reaction from the Forest fans was one of surprise. An unexpected avenue to Wembley might be opening up for the winners of this.

Chris Sutton
Former England striker on BBC Radio 5 Live

It is really daft defending from Lyanco who goes to ground. Jack Grealish drives into the box and Caleta-Carr makes an important block.

Adam Armstrong drops a cheeky nutmeg on Kalvin Phillips, who is having a first City start to forget.

Clinton Morrison
Former Republic of Ireland striker on BBC Radio 5 Live sports extra

Even though it is 1-0, Wolves have played the better football in the last 15-20 minutes and they will be disappointed going into half time not winning this cup tie.

City's Jack Grealish cuts into the box and has a shot blocked. Corner - which Gavin Bazunu punches clear.

So far, so good for Nottingham Forest, who are 45 minutes away from a place in the EFL Cup semi-finals.

Wolves did finish the first-half strongly, though. This one is far from over.

Southampton haven't won a Premier League game since 19 October.

The TV cameras show City's bench and you wonder if Erling Haaland and Kevin de Bruyne might be getting involved at half-time.

Chris Sutton
Former England striker on BBC Radio 5 Live

What a goal this is from Moussa Djenepo!

Picks the ball up from the left-hand side, Stefan Ortega is miles off his line and it is perfection from Djenepo, who just lifts the ball over Ortega who is floundering.

In the last seven years Manchester United are the only team to beat Manchester City in a League Cup game over 90 minutes.

Simon Stone
BBC Sport at the City Ground

That's two superb saves from Dean Henderson to deny Raul Jimenez and Hwang Hee-chan.

He made himself big for the first and then showed impressive reactions for the second, which was a first time effort from Hwang.

The on-loan Manchester United man has preserved Forest's lead. Wolves would expect to score at least one of those chances.

Image source, Getty Images

Rachel T: Wow, Saints currently storming rather than marching!

James Warren:Very good start, now let’s transfer that to the premier league! Well done Saints.

Jack Grealish crosses, it's behind Phil Foden and lands to Cole Palmer, whose shot is blocked. The ball comes back to the youngster but he can't do much better with the second attempt.

Clinton Morrison
Former Republic of Ireland striker on BBC Radio 5 Live sports extra

That is a great save from Henderson. Brilliant.

Wolves have not been at their best but have still created two golden opportunities.

Phil McNulty
BBC Sport chief football writer at St. Mary's

Southampton manager Nathan Jones wants his team to be aggressive. They have been as good as his word and now have a deserved reward with that goal.

Jones, a constant presence in the technical area trying to orchestrate every move for his players, punched the air in delight when Sekou Mara's shot flew in. He has had a tough start at St Mary's and that will make life feel a whole lot better.

Dean Henderson again!

He saves from point-blank range to deny Hwang Hee-chan. Henderson is then up quickly to keep out a shot from distance on the follow up.

Wolves have suddenly stepped it up a gear.

Kyle Walker is playing at centre-back for City tonight with Joao Cancelo and Sergio Gomez on the sides.