Referee Serdar Gözübüyük changed his mind in game over the disallowed Scotland goal against Spain, John McGinn has claimed.
The UEFA official chopped off McTominay's wicked free-kick effort after a VAR review at the pitchside monitor.
And at first it appeared Jack Hendry was ruled to have fouled Spanish keeper Unai Simon as the ball flew into the far corner.
Referee Gözübüyük even signalled for a foul when he returned to the pitch after watching the incident on the pitchside monitor.
However, UEFA sources later suggested to broadcaster Viaplay that offside was the reason for the goal being chopped off in Seville.
And McGinn insists Gözübüyük changed his mind over the decision during the game to go from a foul to offside as the reasoning for the disallowed goal.
On Viaplay, McGinn said of the incident: "Well, he changed it in game which is the frustrating thing. That shows it is not clear and obvious.
"I don't know if clear and obvious is a European VAR thing but at that moment Jack makes a decision to step the other side. He could probably stay. No goalkeeper in the world is going to save that.
"However, he is saying at one point it's a foul, he then changes it because he realises it isn't a foul to offside. It's a big, big moment."
And quizzed on the disallowed goal on BBC, McGinn further added: "Then the goal, you think you have got a goal to qualify - an absolutely unbelievable strike from Scotty, no keeper in the world is saving that.
"The referee decides that it's a foul, and he then changes it in play to decide it is offside, so I'm not sure how clear that is.
"That's the thing that stings really. You can take a team like Spain picking you apart.
"We get the free-kick, we get the big moment, we score. I've watched it back, Jack's right leg is offside but it's very, very harsh."
