Celtic manager Brendan Rodgers says his side should have been given a free-kick in the lead-up to Bayern Munich's winner last night.
Alphonso Davies popped up in the dying embers of stoppage time to give the Germans a narrow 3-2 aggregate victory.
In the build-up to Davies' late winner, Celtic forward Daizen Maeda appeared to take a blow to the face from Dayot Upamecano.
Referee Benoit Bastien waved play to continue, however, and Bayern eventually scored from the resultant attack.
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Post-match, Rodgers was asked about a possible 'foul' in the lead-up to the all-important goal: "That's a little bit of probably our inexperience at this level," he said.
"Upamecano was clever. He picks Maeda up because if he stays down and it was a knock on the head, I felt the referee should have gave the free kick anyway or certainly stopped the game.
"Maybe a more experienced player or team might have stayed down and then the referee has to stop the game. But he didn't.
"He played on and then eventually, obviously, they get the goal. So, yeah, we were disappointed that we obviously didn't get that in the build-up."
The game looked all but set to head to extra time until Davies' late strike.
Nicolas Kuhn drew Celtic level in the tie on 64 minutes, although he and his teammates were left gut-wrenched at the final whistle.
The Parkhead side now turn their attention back to domestic matters, with a trip to face Hibernian in the Scottish Premiership on the horizon this Saturday.
