Celtic boss Ange Postecoglou was left furious after his side were denied a penalty during the Old Firm and has hit out at the officiating crew.
The Celtic boss has even suggested that the decision would be 'different' if the shoe was on the other foot.
And it is understood the club has approached the SFA for a explanation over the implementation of VAR.
Rangers boss Michael Beale claims the decision was "spot on" - but his Glasgow counterpart wasn't having it.
Postecoglou said: "It's just really confusing now for players in the box to know what they can or can't do, because it seems it changes depending on who is in charge of the decision-making process. There has been zero consistency and these things normally even themselves out.
"But with the introduction of VAR and the decisions that have gone against us, there's zero chance that's going to even out by the end of the season. It's just remarkable, we've had at least three major decisions go against us.
"We can say it just comes down to interpretation or whatever people want to say, but I guarantee you if that game finished 2-2 and Rangers were denied that decision, the talk would be about how that was a title-defining decision.
"The fact that it wasn't because we still have a reasonable result, as we have in all the other games like at Tynecastle when the decisions went against us, doesn't mean we should ignore it. That could be a team that gets relegated on a decision like that.
"It still needs highlighted and it still needs clarification. To go back to your original decision, it's a penalty in my mind. Before we even started introducing VAR, it's always been a penalty. There were only two saves in the game; one by Joe and one by Connor."
READ NEXT:
RTE Presenter Jacqui Hurley to quit Sunday Sport after 14 years in role
Pep Guardiola hails Man City's "extraordinary" unsung hero after "important" Chelsea win
Andrew Porter identifies Ireland's potential captain in the absence of Johnny Sexton
OnlyFans MMA fighter has to change gyms after 'wives complain'
Cristiano Ronaldo facing more Al-Nassr frustration as new club 'unable to register' him
Get the latest sports headlines straight to your inbox by signing up for free email alerts
