That corner comes to nothing but the home side have another.

Positive start for the Championship hosts.

Just click play above to watch along.

An early corner for Airdrie.

Away we go.

The winner of this plays Morton. No disrespect to the Greenock side, but that's an incentive.

Here come the teams...

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Celtic manager Brendan Rodgers tells BBC Scotland: "It was tricky conditions, but I thought we dealt with it well. St Mirren made a good start, we had to be strong, but then we got the goal and we were resolute.

"Second half we managed the game really well, we could have won more convincingly but the second goal calms everything. The players were fantastic and the only thing I would say was we could have scored more goals.

"The intention is to [kill the game off] but I can't complain. This was going to be a tricky tie for us and we came through it really well."

Airdrieonians: Rae, Watson, McCabe, Fordyce, Hancock, Telfer, McMaster, Lyall, Frizzell, McGregor, Todorov.

Substitutes: Hutton, Ballantyne, Taylor-Sinclair, O'Connor, C Gallagher, Dunlop, Donnell, G Gallagher, Cassidy.

Hearts: Gordon, Lembikisa, Halkett, Kingsley, Cochrane, Baningime, Nieuwenhof, Grant, Forrest, Vargas, Shankland.

Substitutes: Clark, Kent, Atkinson, Devlin, Rowles, Denholm, Tait, Fraser, Tagawa.

Airdrieonians player-manager Rhys McCabe tells BBC Scotland: "We know how good a side they are, they're on a great run of form, but we've got the advantage at home and we need to use every bit of advantage we can.

"It's been a big thing for me since I've been here - every time we've played so-called bigger opposition we've done reasonably well. I think the reason for that is we've imposed our style on the game fairly early on.

"I played against [Lawrence Shankland] years ago when he was at Ayr United. He's always a danger, so we've got to make sure the defence as a unit are on our toes."

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• Greenock Morton v Airdrieonians or Hearts
• Celtic v Livingston
• Aberdeen v Kilmarnock
• Hibernian v Rangers

Hibernian v Rangers

Aberdeen v Kilmarnock

Celtic v Livingston

Greenock Morton v Airdrieonians or Hearts

Here comes the draw.

And here's a reminder of the teams:

• Aberdeen
• Airdrieonians or Hearts
• Celtic
• Greenock Morton
• Hibernian
• Kilmarnock
• Livingston
• Rangers

Between both these sides, it's a combined unbeaten run of 17 games.

Hearts hold 10 of them, with Airdrie taking the other seven.

Hopefully makes for a proper cup tie.

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Hearts head coach Steven Naismith tells BBC Scotland: "In their last five games against Premiership opposition, Airdrie have won four of them.

"So we're not under any illusions this is going to be anything other than a tough game.

"The way they play the game can cause teams problems - they are well drilled and we need to guard against that. Our players understand what we want to do, where we can hurt teams, and today is no different.

"I expect them to come try cause us problems. They have a real confidence and belief in possession of the ball. I expect an entertaining game - two teams that want to attack.

"We've got a really healthy squad. Competition is high. Craig [Gordon] comes in because he's back to where he was before his injury. Frankie Kent has a little niggle and we've been pushing him, but we don't want to push too far."

St Mirren manager Stephen Robinson tells BBC Sportsound: "Ultimately Celtic had two chances and they scored two goals, they were clinical.

"We had chances, and we didn't take them. We hit the crossbar, the ball doesn't break for us, they hit the crossbar and it breaks for them - it's fine margins.

"It's hard for me to criticise any of the players in terms of their work rate and quality on a tough surface, that's the difference in levels.

"When we are making the game that close with our level of resources then it shows what a group of players we've got.

"We should have defended both goals better, they didn't cut us open or create clear-cut chances. Celtic have to be given credit for the way they defended, we tested them a lot.

"They deserved to win the game because they defended better in one box and they were clinical in the other."

Sportscene is starting 🚨

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Rhys McCabe makes just one change to the Airdrieonians side that beat Raith Rovers in the Challenge Cup semi-finals.

Rangers loanee Arron Lyall comes in for Northern Irish midfielder Liam McStravick.

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Craig Gordon makes just his second appearance of the season in goal for Hearts, having started in the previous round of the cup against The Spartans.

Steven Naismith makes two further tweaks to the Hearts side that beat St Johnstone last time out.

Craig Halkett and Jorge Grant start in place of Frankie Kent and Scott Fraser.

Image source, SNS

It's a relatively rare sight in senior football these days to have a player-manager in your team - let alone two at the heart of your defence.

Yet Airdrie boss Rhys McCabe and assistant Callum Fordyce have turned their formidable defensive partnership on the field into a successful coaching duo off it.

It might help that the 31-year-olds are cousins, and the pair also believe their playing partnership in the Diamonds backline has been a key part of their thriving coaching career.

Read more in our match preview here.