The Dons are having to defend for their lives to cling onto their narrow lead as Killie send in corner after corner.

The home side are really pushing for an equaliser.

Jonah Ayunga races into the right of the Hearts penalty area and aims for the far corner.

But Alexander Schwolow is down to his right to tip it away.

Hearts cannot deal with balls into their box tonight.

Another deep free-kick causes carnage and Miguel Freckleton glances a header wide.

All of a sudden, Hearts are cranking up the pressure as Harry Milne watches his shot get deflected behind.

The corner is cleared.

Stuart Kettlewell responds, with Scott Tiffoney coming on for Greg Kiltie.

Jonathan Sutherland
BBC Sport Scotland at SMiSA Stadium

Our VAR information is that the Miguel Freckleton goal was ruled out because Mark O'Hara was in an offside position. As it was subjective around the impact the referee was summoned to the VAR monitor.

In the opinion of the ref, O'Hara impeded Lawrence Shankland, allowing Freckleton a free header.

Rangers cause havoc with a free kick into the box, but Hibs just scramble it away.

There's so little between the sides but Rangers have the advantage still.

Awwww United - that was the chance!

It's a brilliant pick out to find Dario Naamo at the back post. He cuts it back to Luca Stephenson, who passes it off the base of the post from a few yards out. Had to score.

Charlotte Cohen
BBC Scotland at Rugby Park

The Kilmarnock fans are not happy with referee Duncan Nicolson's performance and they are making it known.

It's been much better from the hosts in the second half but it's turned into a very stop-start affair in Ayrshire.

Jimmy Thelin is first to turn to his bench, as Marko Lazetic makes way for Kevin Nisbet.

What a save!

A superb stop from Alexander Schwolow as he tips wide a close-range header from Killian Phillips.

How are Hearts still in this?

Hearts are still on the ropes despite that lifeline.

Another deflected Mikael Mandron strike flashes wide of the near post.

Jonathan Sutherland
BBC Sport Scotland at SMiSA Stadium

Lawrence Shankland had a great chance right after the restart as he was given the freedom of the St Mirren box, but he went wide and the angle became too tight and Shamal George made the save.

After that it was a St Mirren onslaught, Mandron and Phillips both with big chances. But it was Miguel Freckleton who would make the difference, lashing home from close range to make it 2-1 and this place erupted.

A second strike from Freckleton was then controversially ruled out by VAR, which has put a dampener on the home crowd's jubilation.

Hearts have only managed one win here in their previous eight visits. Heading for nine at this rate.

Liam Gordon, Ibrahim Said and Apostolos Stamatelopoulos are on for Motherwell. Stephen Welsh, Regan Charles-Cook, and Callum Hendry are off.

United, meanwhile, have brought on Kristijan Trapanovski and Ivan Dolcek.

Hibs make a triple change. Martin Boyle, Junior Hoilett and Elie Youan are on.

Dan Barlaser, Kieron Bowie, and Thibault Klidje, who's just taken a blow to the back of the head, are off.

Rangers bring on Thelo Aasgaard for Mikey Moore.

OK, this takes a bit of explaining.

The referee goes to the monitor for an offside decision because the VAR team feel Mark O'Hara, who was in an offside position, has blocked Lawrence Shankland's attempted run.

The referee agrees. Back to 2-1.

Image source, SNS

Graeme Shinnie goes on a great solo run from the halfway line, but he's brought down by Brad Lyons before he can reach the box.

The Killie captain is given a booking for the challenge and Jesper Karlsson's free kick bounces off the wall and comes to nothing.