It has been a title race stuffed with excessive drama and when the Premiership prime two face off you realize there can be loads extra to return.
Celtic prolonged their lead on the prime of the desk over Rangers in a highly-charged showdown at Ibrox.
The battle for the title has been so tight between the Glasgow rivals this season, so there was understandably a pointy give attention to each determination made by the referee.
Skilled whistler Willie Collum took cost of the conflict and had his justifiable share of huge calls in Govan.
He has been the person within the center many a time when these two Glasgow heavyweights have gone head-to-head, however the significance to the title race added further stress on his shoulders.
Document Sport runs the rule over Collum's massive calls on a day of frenzied drama in Govan.
Carl Starfelt on Joe Aribo
With Rangers seeking to reclaim their lead after Tom Rogic's equaliser, there have been loud claims from the house crowd of a foul on Joe Aribo within the field from Carl Starfelt.
The Nigeria midfielder collected the ball within the field and the Celtic centre-back clipped the Rangers man as he modified route.
The contact seemed to be inadvertent from Swede and the penalty declare was waved away by Willie Collum.
Verdict: Not a penalty.
Allan McGregor on Daizen Maeda
Forward of Cameron Carter-Vickers' winner, Daizen Maeda burst into the Rangers penalty field and shrugged off the house defence.
Allan McGregor rushed out of his objective and narrowed the angle as Maeda seemed to drag the set off.
The striker collapsed below the problem of the veteran stopper earlier than the ball flew in the other way.
However IFAB guidelines state a penalty kick is simply awarded if the foul is "thought-about by the referee to be careless, reckless or utilizing extreme drive."
On this occasion it appeared like each gamers had nowhere to go after a full-blooded problem within the field.
Verdict: Not a penalty.
Cameron Carter-Vickers handball
After a neat move from Ryan Kent to slide in Ryan Jack, the Rangers midfielder tried to cross the ball into the Celtic field.
The ball then strikes the American defender on his higher left arm, adopted by loud claims from the stands and the Rangers gamers for a penalty.
Nevertheless the defender was pretty near the ball and his arm was not raised.
It will be troublesome to justify a spot-kick utilizing the "unnaturally larger" rhetoric utilized by IFAB.
Verdict: Not a penalty.
Ryan Jack and Giorgos Giakoumakis conflict
The Rangers midfielder did not take kindly to feedback from the Greek striker claiming Celtic had been higher in each division.
Jack branded Giakoumakis "disrespectful" within the build-up to the Ibrox showdown and people tensions spilled over right into a derby day flashpoint.
Giakoumakis flew right into a late problem on Jack nicely throughout the Rangers half, earlier than the pair grew to become entangled.
There have been some purses between the pair following the deal with, with the Celtic striker deservedly booked for the preliminary deal with.
Jack then appeared to lean a hand on the Greek frontman's head - one thing which might usually be outlined by IFAB as "unsporting behaviour" below the subcategory of exhibiting a "lack of respect for the sport."
It left Giakoumakis livid and that motion deserved a yellow card.
Verdict: Each gamers ought to have been booked.
Cameron Carter-Vickers on Connor Goldson
Connor Goldson was the goal of James Tavernier's whipped nook into the field because the hosts pushed for an equaliser.
Nevertheless, Carter-Vickers grasped onto Goldson's shirt as each gamers tussled to succeed in the ball. Kenny Miller branded it a "stonewaller".
Strictly following IFAB guidelines, a penalty kick ought to be awarded in any occasion the place a participant "holds an opponent", so if VAR had been in play Collum could have had a second have a look at it.
However Collum was prepared to let loads go and the character of the derby led to Goldson and Rangers left wanting not being awarded a spot kick
Verdict: IFAB guidelines could nicely have dictated VAR test if video replay was put in.