Ryan Edwards heads over from close range for United, although it likely it wouldn't have counted anyway with the visiting captain climbing all over his marker.

After Thistle's flurry of chances at the start of the half, United are having their most sustained period of pressure in the game.

Ciaran McKenna makes a great tackle to deny United midfielder Ilmari Niskanen at one end - then Thistle race forward and striker Alex Jakubiak has a shot deflected wide.

Greg Kiltie receives the ball from fellow midfielder Jordan Jones who had made a driving run towards the box.

Kiltie turned on the ball and fired a low, arrowing show into the bottom corner from the edge of the box.

Image source, BBC Sport

Tony Watt has the chance to make it 2-0 to United, but the striker lifts his shot over the bar despite being left unmarked.

It's been a thrilling second half so far.

Gary Woods follows that impressive save with some nervous juggling at a corner and the Aberdeen goalkeeper is indebted to his defence as a fierce effort from Kevin van Veen is blocked.

Joe Efford runs away from a couple of Aberdeen defenders and plays a smart pass through to Kevin van Veen. The Motherwell striker lets go a rising shot and goalkeeper Gary Woods does well to claw it away.

It's a proper goalmouth stramash in the United box, but Thistle can't squeeze the ball home to equalise.

The home side are pushing hard for an equaliser.

Vicente Besuijen races on to a long ball over the top from Aberdeen captain Scott Brown. Goalkeeper Liam Kelly is out to meet him at the edge of his box and the forward tamely taps the ball straight into his gloves.

Ouch!published at 16:11 Greenwich Mean Time 12 February 2022

16:11 GMT 12 February 2022

Heart of Midlothian 0-0 Livingston

A spell of Livingston pressure is denied by a few desperate blocks.

Beni Beningime goes with a head knock as the midfielder wins a free-kick that gives the home side a breather.

A huge chance for Thistle, who have started the second half well.

Winger Scott Tiffoney's shot is deflected but falls into the path of Brian Graham, but it's knocked away for a corner before the striker can finish.

What a special strike from the on loan Wigan winger to open his St Mirren account!

Jordan Jones gathers the ball on the touchline and drifts towards the box before checking back on to his right foot and curls his strike into the top corner from the side of the box.

Image source, BBC Sport

Changes at half-time for St Mirren as defenders Marcus Fraser and Richard Tait are off, with Scott Tanser and midfielder Ryan Flynn coming on.

An early chance for Thistle in the second half.

Benjamin Siegrist spills a free-kick into the box, the ball eventually ends up with Kevin Holt and the United goalkeeper has to tip the midfielder's shot over the bar.

We're getting under way again around the country.

No cup shocks on the cards so far...

So far it's Mothewell, Dundee United and St Mirren heading into the quarter-finals.

But, just like at Tynecastle, where Hearts and Livi are goalless, it is still too tight to call.

Airdrie are the big movers so far in the two games between the top two in League 1.

Dumbarton and East Fife look to be heading for fine wins at the bottom.

There's not much happening in the Championship goals-wise, although second-bottom Dunfermline did miss a penalty against second-top Kilmarnock.