Former Rangers star Richard Foster insists Celtic defender Cameron Carter-Vickers should have been penalised for a pull on Connor Goldson in the box.
The potential penalty incident has been pored over by pundits as after Goldson tussles with the American international as he looks to meet a James Tavernier corner.
Referee Willie Collum also waved away claims that Carter-Vickers had handled a cross from Ryan Jack in the box, while Daizen Maeda's appeals after going down under an Allan McGregor challenge through on goal were also turned down.
Speaking on the PLZ Football Show, pundit Tam McManus admitted the tug from the Celtic man was the one question mark about the whistler's performance.
When asked if it was a penalty for the handball incident involving Carter-Vickers, McManus said: "Not for me.
"He has just blasted off his arm and I don't think it's an unnatural position.
"I think the one later on where he has pulled the jersey could have been a penalty.
"I thought overall the referee got the big decisions right but the only contentious one was the pull."
Foster was more definitive, insisting that it was more than the usual pushing and shoving in the box during a set-piece.
The former Rangers defender said: "The tug is a penalty. I mean, if you take it in isolation, there is always grappling in the box, but what usually happens is that the foul is given on the player who let's go a fraction of a second before.
"There is a bit of grappling, but he has got his shirt, it's a penalty.
"The Maeda one as well, if he goes down when the contact happens I think he gets the penalty, but I think it's because he takes another step the referee thinks there is not enough for it to be a penalty.
"These decisions never decided the game, I thought the fact Rangers couldn't hold on to their early lead decided the game."
