There's three games in the fourth tier, with match of the day at Falkirk Stadium.

Leaders Queen's Park, who are temporary residents after selling Hampden and preparing to move permanently to Lesser Hampden, host Stirling Albion, who are seven points behind in third.

Image source, BBC Sport

Dumbarton manager Jim Duffy tells BBC Scotland: "They gave everything they had. We wanted to make sure the players did themselves justice and they did that.

"We gave Aberdeen an uncomfortable afternoon. We just wanted that one chance.

"We actually had a couple and Joe Lewis has made a some great saves."

There's also a couple of big games in the Scottish Championship.

Stumbling runaway leaders Hearts can take a major step towards the title and a quick return to the top flight if they win away to another side who have hit a slump in form - Dunfermline Athletic.

The Pars are desperate to bounce back from squandering a 2-0 lead to lose at Dundee and then being hammered 5-1 away to neighbours Raith Rovers to slip outside the promotion play-off places.

Meanwhile, the bottom two are in a head-to-head over at Gayfield, where hosts Arbroath can move above Greenock Morton with a two-goal win over an Alloa Athletic side who would surely be consigned to relegation should the four-point gap at the bottom get any wider.

Image source, BBC Sport

Aberdeen caretaker manager Paul Sheerin tells BBC Scotland: "The longer the game goes on, the more precarious it becomes. We asked them to show patience and they got their reward. We were well worth the win in the end.

"We could be more ruthless, especially in the first half, but the fact we stuck at it was really pleasing."

Asked what he thought incoming manager Stephen Glass would think about the display, he adds: "We'll catch up with him on the way home and see what he's thinking."

Dundee United: Deniz, Sporle, Reynolds, McNulty, Edwards, Robson, Butcher, Bolton, Harkes, Shankland, Fuchs.

Substitutes: Siegrist, Connolly, Pawlett, Clark, Chalmers, Appere, Bisland, K.Smith, Walker.

Partick Thistle: Wright, McKenna, Foster, Niang, Brownlie, Docherty, Cardle, Bannigan, Graham, Gordon, Tiffoney.

Substitutes: Sneddon, Penrice, J.Lyon, Rodden, Williamson, Murray, Rudden, MacIver, Ocholi.

Hamilton Academical: Fulton, Odoffin, Hodson, McMann, A Martin, Easton, Hughes, S Martin, Callaghan, Moyo, Anderson.

Substitutes: Gourlay, Scully, Stirling, Hamilton, Stanger, Munro, C Smith.

St Mirren: Alnwick, Shaughnessy, McCarthy, Fraser, Erhahon, Doyle-Hayes, Durmus, McGrath, Connolly, Erwin, Obika.

Substitutes: Lyness, Tait, Finlayson, Flynn, Reid, MacPherson, Henderson, McAllister, Dennis.

We'll bring you more reaction from Dumbarton, but we'll now turn our attention to the rest of this afternoon's cup fixtures.

Aberdeen scrape through to the fourth round of the Scottish Cup with a one-goal win over Dumbarton for a second season running.

They needed a late penalty last season and this time it is a Callum Hendry goal with seven minutes remaining that sends the Premiership side through.

The League 1 part-timers will take heart from giving the visitors a few frights along with way as they now concentrate on the rest of their hectic schedule and trying to avoid relegation.

Image source, SNS

Aberdeen are finishing on attack and it looks like Dumbarton's chances are over.

We are into three minutes of stoppage time.

Can Dumbarton find an equaliser?

Dumbarton boss Jim Duffy makes a double change.

One-time Celtic striker PJ Crossan and Rico Quitongo come on for Adam Frizzell and Robert Jones.

Might be a bit late to make any difference to the result.

Craig Levein
Former Scotland manager on BBC Sportsound

As with last season, it looks like another goal in the final 10 minutes is going to save Aberdeen's blushes against Dumbarton.

Substitute Callum Hendry makes space for himself on the edge of the penalty box and the on-loan St Johnstone striker fires low past goalkeeper Sam Ramsbottom.

Just when it looked to be heading for extra-time, the Premiership visitors make the breakthrough.

Image source, BBC Sport

Craig Levein
Former Scotland manager on BBC Sportsound

The River Clyde is looking as un-rippled as either net in the background as Dumbarton deny Aberdeen again.

Jonny Hayes then Niall McGinn have shots blocked in front of goal.

Another change for the Dons as Scotland Under-21 forward Connor McLennan is sent on in place of the even younger Ethan Ross.

We are reaching around the time that Sam Cosgrove got Aberdeen's winner against Dumbarton in last year's third round.

Will another late penalty decide it this time?

Robert Jones is making a nuisance of himself up front for Dumbarton and only a desperate last-ditch challenge by Tommie Hoban prevents the striker bursting clear one-on-one with goalkeeper Joe Lewis.