Craig Halkett meets a corner at the back post and guides it on target, but Kevin Holt is there to swipe it away for United.

Halkett needed to get a bit more power on that.

Amy Canavan
BBC Scotland at McDiarmid Park

St Johnstone manager Simo Valakari has seen enough and makes two changes after 26 minutes.

Max Kucheriavyi and Aaron Essel are on for Andre Raymond and Matt Smith.

Both are straight down the tunnel.

Amy Canavan
BBC Scotland at McDiarmid Park

The travelling Dundee fans are in dreamland. This game is done and dusted before half three.

St Johnstone are in big, big trouble and the home fans are furious at this defensive display.

Image source, SNS

Brian McLauchlin
BBC Scotland at Tannadice

Around 10,000 fans inside Tannadice today with 1,800 of those making their way up from the capital to support Hearts. So far, neither set of fans have had much to shout about!

Image source, SNS

What an opening 25 minutes for Dundee - reminiscent of Ayr United's against Raith Rovers in the Championship yesterday.

Three goals already and the three points look well on their way to Dens Park.

Image source, SNS

The ball drops to United's recent hero - Kevin Holt - but he sclaffs his effort wide.

There's nothing between these sides at the moment.

Marcus Fraser has to head behind for a corner following the latest wave of Celtic attack and Zach Hemming is called into action to palm away the danger.

St Johnstone have had 75% possession in the first 20 minutes.

They are 2-0 down. It's not far away from three as Lyall Cameron fires over.

And breathe...

After a rather stop-start opening half-hour or so the game was given a shot in the arm as Ewan Wilson's thumping finish put the hosts ahead.

Aberdeen were then reduced to 10 men when Slobodan Rubezic was shown a straight red card and Tawanda Maswanhise piled more misery on the Dons just a minute or so later with a smart finish to double his side's lead.

Both sides are in need of a win, it looks unlikely Aberdeen will stop the slide anytime soon, though.

Image source, SNS

Little bit of Scottish FA guidance on that Aberdeen red card...

Slobodan Rubezic twice moved his head toward Tony Watt, in a way that was deemed more than negligible. Hence he was sent off for violent conduct.

Another chance for Ross County but when the moment comes for the final ball to be pulled back to an unmarked Jack Grieves in the box, the pass is too far in front of him.

It's tough trying to keep up with the action today. Goals, a red card and now the woodwork being given a workout...

Liam Boyce's cross rattles the frame of the goal! It would have been lucky, but Hearts go close to the opener.

Gully Singh
BBC Sport Scotland at Rugby Park

Josh Nisbet with the best chance of the game as Kilmarnock manager Derek McInnes had his hands on the back of his head perhaps expecting County to take the lead.

Robby McCrorie saves the day as it remain goalless here.

Image source, SNS

A straight red for Slobodan Rubezic for his reaction in the aftermath of a confrontation with Tony Watt.

The Dons defender falls under a challenge from the 'Well striker, and the latter leans over to tell him what he thinks of the Aberdeen man.

Rubezic jumps up and appears to move his head towards Watt.

VAR checked the decision and upheld the referee's decision.

Andy Burke
BBC Sport Scotland at Celtic Park

Stephen Robinson will be pleased at the way St Mirren managed to ride out that period of pressure at the start of the match.

Celtic found their rhythm and tempo early and the visitors had to withstand several dangerous balls into their box.

They dealt with that well, but a long way to go.

Image source, SNS

No offside. Dundee are two up at McDiarmid Park.

Ross County's first chance of the game falls to Joshua Nisbet.

Corrie Ndaba takes a fresh air swipe with the ball falling to Nisbet on the edge of the box. He dummies and moves on to his left, but puts his shot straight at the keeper.

Should do better.