Simon Donnelly confesses that Celtic obtained away with a "mushy" foul within the build-up to their opener in opposition to Rangers.
A well-worked free-kick would see Greg Taylor slot the ball into the underside nook at Hampden.
Rangers would run out winners with Scott Arfield's leveller and Carl Starfelt's personal objective in additional time turning the semi-final round.
Nonetheless, Donnelly pinpointed the incident that led to the opener in his post-match debrief.
The previous Parkhead hero felt that Cameron Carter-Vickers went down simply underneath strain from Kemar Roofe to earn the important set-piece.
Donnelly informed BBC Sportscene: "From a Rangers perspective, I believe there's a little little bit of a mushy free-kick.
"I believe Carter-Vickers tries to return out of this case (with Kemar Roofe) and he seems to be like he's a bit off stability.
"Then Celtic win themselves a mushy free-kick.
"However from then they capitalise brilliantly."
Calvin Bassey's cross, which led to Starfelt directing the ball into his personal internet, additionally obtained the Sportscene therapy.
Ryan Kent slid the ball to the full-back earlier than Stephen Welsh might catch the Nigeria worldwide.
The whipped ball would find yourself in Joe Hart's internet, however Donnelly reckons that the linesman ought to have raised his flag.
He added: "You have to give them credit score. They performed 120 minutes on Thursday evening, and also you see the power of Bassey.
"You'll have thought Celtic would have been displaying the power on the stage.
"It's extremely tight (Kent's ball to Bassey). Clearly we may have VAR subsequent season, and it is very, very tight. From a Celtic view, you're wanting that to be offside.