Don't forget, we will have clips of the best of the action in this page throughout the night.

After seeing off Cambridge, Shrewsbury needed an extra-time goal from Daniel Udoh to send the Shrews into the third round of the FA Cup and end Oxford City's run.

Highlights available to UK users only.

Before we get going at St Mary's, let's have a quick look at how Shrewsbury got to the third round...

Watch highlights as Shrewsbury won 2-0 at League Two high-flyers Cambridge in the FA Cup first round.

Available to UK users only.

Matthew Noble: No reason why a team like Southampton can't go for the FA Cup this season it's been a strange season so far so why not? It would be nice to have a different club win it and they have played brilliantly so far this season.

For those looking at the Shrewsbury side and wondering where Charlie Daniels and Marc Pugh are.....

Well, it looks like they have been deemed surplus to requirements, with the Shrews announcing, external that the former Bournemouth duo will be leaving the club at the end of January.

Both signed short-term deals with the club in October.

Southampton

Southampton manager Ralph Hasenhuttl promised a blend of experience and youth and it looks like he has stuck to his word.

The likes of Fraser Forster and Shane Long have been drafted in but there is also a first start of the campaign for forward Daniel N'Lundulu, while Kegs Chauke, 18, comes into midfield with Caleb Watts, 19.

In the full-back positions French right-back Yan Valery makes his first senior start of the season and Jake Vokins, 20, comes in on the opposite side of the Saints back four.

The England youth international starts for the first time since he scored in the win over Huddersfield at this stage of the FA Cup last term.

As always you can have your say on all the action so tweet us using #bbcfootball and we will put your messages in this page throughout the evening.

Image source, Getty Images

Shrewsbury Town boss Steve Cotterill will watch tonight's FA Cup third-round tie at Southampton from his hospital bed as he recovers from Covid-19.

Having tested positive last week, the 56-year-old was admitted to hospital near his family home in Bristol on Friday after his symptoms worsened.

But, after entering intensive care over the weekend, he is now recovering.

"I can tell he's getting better as he's begun to crack jokes," assistant Aaron Wilbraham told BBC Radio Shropshire.

"He's told me to tell the boys to say he'll be watching from his hospital bed, so they'd better be at it.

"We've really missed his energy around the place. He's been really poorly with it for the last two weeks and he was in intensive care over the weekend. But his voice now sounds a lot better."

Shrewsbury will be playing for the first time in three weeks when they step out at St Mary's in the FA Cup, having not played since 29 December.

Boss Steve Cotterill will be missing from the Shrewsbury dugout as he recovers in hospital after testing positive for coronavirus and a stay in intensive care.

Assistant coach Aaron Wilbraham will take charge of the match and says it is a good opportunity for the Shropshire club to cause a cup upset.

"We are obviously expecting a difficult game away from home," Wilbraham said. "But it's a chance for us to go there and prove ourselves against top opposition."

It's cold and wet at St Mary's Stadium. Perfect conditions for a cup upset.

Only four players remain for the Saints from the side that started the 2-0 loss to Leicester on Saturday - Jan Bednarek, Jack Stephens, Ibrahima Diallo and James Ward-Prowse.

Southampton: Forster, Valery, Bednarek, Stephens, Vokins, Diallo, Ward-Prowse, Chauke, Watts, Nlundulu.

Substitutes: Lewis, Tchaptchet, Walker-Peters, Bertrand, Jankewitz, Armstrong, Ferry, Adams.

Shrewsbury, 17th in League One, play for the first time since 29 December and name eight of the 11 that began the 1-0 win over Blackpool.

Shrewsbury: Sarkic, Williams, Pierre, Ebanks-Landell, Pennington, Golbourne, Vela, Norburn, Whalley, Udoh, Chapman.

Substitutes: Burgoyne, Edwards, Goss, Pyke, Clarke, Sears, Tracey, J Daniels, Cummings.

Press the play button at the top of this page to listen along to BBC Radio 5 Live commentary from St Mary's Stadium.

Hello and welcome along to BBC Sport's coverage of the last FA Cup third-round tie of the season as Southampton hope to avoid a shock against Shrewsbury Town.

Kick-off is at 20:00 GMT and we will have live radio commentary and in-play clips for you as well.

We already know 31 of the 32 teams through to the fourth round of the FA Cup, and by the end of tonight we will know the last team to qualify.

Premier League Southampton take on League One side Shrewsbury in a match rearranged because of Covid-19.

It's got to be sorted out tonight, with extra time and penalties a possibility if needed.

Image source, Getty Images