Former Celtic midfielder Stiliyan Petrov believes Kris Commons should apologise to the club after his meltdown in Molde.
With the Hoops trailing 3-1, Commons reacted angrily to being substituted by manager Ronny Deila which the Norwegian boss blasted as “unacceptable”.
And Petrov says the midfielder let himself down.
“Sorry Kris, it’s really poor,” he told BT Sport.
“I think he should apologise to everyone involved at Celtic it doesn’t matter how much you are frustrated.
“First of all, the team had a poor night. He scored a good goal but there was nothing special in his performance.
“He should have just put his head down and waited for the next game.
“Tonight he let himself down.”
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Meanwhile, Petrov believes it could have been a lot worse for the hapless Hoops.
“Celtic lost to a very average team and I mean no disrespect to Molde by saying that. However, there’s no getting away from it – they are average.
“But they were better organised, they had a plan and they stuck with it.
“Every goal they scored came from a Celtic mistake. It could have been about ten by the end of the game.
“Everything was wrong with Celtic, tactically and positioning. There was bad passing, bad defending and bad positioning. It was a shambles.
“And Craig Gordon can’t allow himself to be beaten at the near post for the first goal.
“The second goal, too, showed Celtic caught on the back foot. Emilio Izaguirre doesn’t do anything. He doesn’t see danger and he doesn’t mark anybody.
“He turned his back when the player shot. You can make a bad decision, but you must stay strong.
“When Celtic got it back to 2-1 and then lost another inside 60 seconds, well that is just unacceptable at this level.”