Some differing views in the Sportsound studio over that Gary Mackay-Steven incident.

"It's all about opinions, but for me, it's an absolute stonewaller - you can't get within that touching distance of him," says Billy Dodds. "If you get too close, where is his leg going to go?"

Willie Miller replies: "I don't think you can concede a penalty because of an opposition player kicking you!"

Fed, watered and ready to go for the second 45? Magic, let's get under way.

It's goalless at Fir Park but not for the lack of trying. The hosts have huffed and puffed without really testing Craig Gordon; Celtic have gone close through Callum McGregor and Kieran Tierney.

Shooting boots on for both sides at the break, please...

Image source, sns

Image source, SNS

Kieran Tierney looks odds-on to put Celtic ahead in stoppage-time after a lovely pass from Tom Rogic. But Motherwell keeper Trevor Carson makes a brilliant save, Tierney's shot bouncing off his hand and somehow, over the bar.

Graeme Murty's side hold a two-goal cushion at the break after swarming all over a frazzled Aberdeen side at Ibrox. James Tavernier and Carlos Pena with the goals and little to cheer for the Dons. How costly will the Gary Mackay-Steven miss prove?

Image source, sns

Willie Miller
Former Aberdeen defender on BBC Sportsound

"I think there is minimal initial contact on Mackay-Steven from Tavernier - after that, I think Mackay-Steven kicks the ground."

Instant imapct for Mackay-Steven, who bursts past James Tavernier and into the penalty atrea, but skews his shot wide. Mackay-Steven claims angrily for a penalty, with Tavernier having caught him on his way into the box, but the Aberdeen player is booked for dissent by referee Andrew Dallas

Aberdeen manager Derek McInnes not waiting until half-time to make chances, with Gary Mackay-Steven coming on for Greg Tansey.

Consecutive corners for Motherwell. The first one eludes everyone, Carl McHugh failing to connect as he slides in at the far post. Celtic get the second one away, but the hosts look a threat when they deliver high balls into the box.

At the other end, Callum McGregor works space for himself on the edge of the box, but his curling effort is well wide.

Billy Dodds
BBC Scotland summariser

"Aberdeen look unsure all over the place - midfield, or that back three.

"They're going into unfamiliar areas, they don't know who is going where - they don't want to go wide to pick up Miller, but they better organise it quickly."

A blizzard of yellow cards in the first half at Ibrox. Ross McCrorie earns a booking for an aerial challenge on Kenny McLean; referee Andrew Dallas will have a case of tennis elbow before the night's out...

Stevie May stabs the ball just wide of the upright from Andrew Considine's cross as the Dons spurn an opportunity to reduce the deficit.

Billy Dodds
BBC Scotland summariser

"Every time Kenny Miller strays into that wide area, they fill the box. Tavernier, Windass, Pena have all been in there."

Aberdeen goalkeeper Joe Lewis rushes off his line to block James Tavernier from close range as Rangers chase a third goal of a pulsating first half.

Celtic captain Scott Brown appears to be removing some objects thrown onto the pitch in his direction. Motherwell fans are up in arms about something and a small group of stewards head in their direction.

Meanwhile, James Forrest bursts into the Motherwell penalty area but his cross is blocked by the covering Richard Tait. Then Leigh Griffiths whips in a dangerous free-kick, but Dedryck Boyata is stretching to meet it and his half-volley sails well over the bar.

Pat Bonner
Former Celtic goalkeeper on BBC Radio Scotland

"There's no doubt these Motherwell players are up for the cause tonight. They're putting their tackles in. Celtic are much more patient in their build-up, but Motherwell are working very, very hard to deny them space."

Graeme Shinnie is the latest Aberdeen player to receive a booking, this time for a late challenge on Jason Holt. Things threatening to boil over at Ibrox.

Aberdeen pull one back... no. An incredible goal-line scramble sees James Tavernier clear his lines after Scott McKenna's effort failed to find the net. Rangers' two-goal cushion remains intact.

Willie Miller
Former Aberdeen defender on BBC Sportsound

"It's that space again, where the full-backs should be and are not. Great timed run from Holt, three central defenders in the box but Pena just strokes it into the back of net.

"You've got to say, on play, it's very deserved for Rangers."