It was even said by Szczesny to polish journos that Allegri himself confirmed to him that he will be 1st GK as he prefers him over Donnarumma.
Anyway its one bad game guys, I know he had blunders before, but lets not act as we now have amateur GK in our squad.
He was saving us before, is not top 5 GK in the world, but he is good and probably still better than Perin.