Ooft, Niall McGinn is through on goal before referee Don Robertson brings it back for a foul on Cammy MacPherson. McGinn did touch him but it was slight.

First corner of the game for St Mirren, but it comes to nothing. It was decent build-up from the Buddies to get the set-piece and Akin Famewo's header can't find the target. They're looking a bit brighter.

But Lee Hodson then trips Matty Kennedy, who takes a quick free-kick which catches St Mirren off guard. But they get away with it. The hosts with most of the ball at the moment.

Currently stretching off the fingers. Cramping up deep into this marathon Scottish Cup stint...

St Mirren full-back Lee Hodson lofts a ball to the back post but nobody from the Paisley club is there.

Terrific pass to Hodson from Sam Foley. Cross-field pearler.

Aberdeen goalkeeper Joe Lewis nips off his line to gather a ball that Jonathan Obika was chasing. Fairly tentative stuff since the goal.

Willie Miller
Former Scotland defender on BBC Sportsound

Image source, SNS

Jane Lewis
BBC Sport Scotland at the Simple Digital Arena

Dons manager Derek McInnes can’t stand still in his technical area. At times it looks like he’s kicking every ball with his team. In contrast, Jim Goodwin isn’t so animated, although he’s pretty vocal on the sidelines.

The weather is horrible. Swirling wind and rain which shows no signs of abating.

St Mirren have managed to steady the ship, as Jonathan Obika makes a foray forward. They looked shell-shocked after conceding early on.

Aberdeen are up for this one. Matty Kennedy bursts forward and skins a few defenders before losing control of the ball as Vaclav Hladky gathers.

We'll bring you reaction from Tynecastle when we have it, by the way...

Curtis Main is inches away from giving Aberdeen an early lead, heading just over the bar from Niall McGinn's free-kick.

Hearts have done it! In a game full of bizarre refereeing decisions, Oliver Bozanic's goal is the difference between the sides. Will this spark their season?

Rangers are staring at another season without domestic silverware, unless they can claw back Celtic in the Premiership.

Zdenek Zlamal, who has barely had a save to make, is wasting some time. Will Rangers get one more chance?

Nasty clash of heads between Rangers teammates George Edmundson and Joe Aribo. They've picked themselves up though.

FYI, the day's other quarter-final between St Mirren and Aberdeen is about to start. You can watch and the top of the page.

Meanwhile, Hearts striker Liam Boyce is on for Conor Washington.

Oh my, what a ball by James Tavernier. It goes right across the goal, but nobody in a Rangers shirt can stick it in.

You wonder if that extra week on the training ground for Hearts, after last weekend's game with St Mirren was postponed, has given Daniel Stendel more time to get his team in shape.

Rangers look jaded from their midweek exertions. They have a free-kick on the edge of the box on the right-hand side, though...

Five minutes of normal time left for Rangers to find something...

What a block by Hearts centre-back Clevid Dikamona. He cuts out Joe Aribo's cross which was heading right for Jermain Defoe in the middle of the box. You wouldn't bet on him missing from there.