Everybody was in agreement that the referee made the right decision by the book - but not everyone agreed that the book was correct.
Michael Ballack and Jamie Redknapp, in the Sky Sports studio, agreed that a penalty is sufficient punishment for a tackle of this kind - and they are not alone.
In fact, they have a very powerful ally in the form of UEFA president Michel Platini.
He believes this is the sort of infringement that would be perfect for his planned ‘sin-bin’ idea.
"I would do it like in rugby, where the perpetrator would be punished by being off the pitch for 10 or 15 minutes of the game. It is an idea which needs now to be developed and to see if it is something that would be good for the game."
And on the subject of goalkeepers being red-carded after conceding a penalty:
"It seems excessive. The penalty is itself already is punishment enough. I think it's something that everyone in Fifa and Uefa agree, but one or two of the countries that make up the International Board are unwilling to change."
Those changes are up for discussion at the moment - and may very welcome into place in the near future - although any changes to the laws of the game are always difficult to enforce.
But Arsene Wenger agrees with his countryman. He feels sin-bins are the right way forward and that Szczesny should have received such punishment against Bayern:
“I agree with that. It's a shame that we have to be a part of the experience to realise that it is not right.”
It is just regrettable that such plans will come too late to save Arsenal’s Champions League tie.
image: © Ronnie Macdonald