Allegri either overvalued Evra/Asamoah, or took for granted/overlooked Sevilla.
Either way, he was wrong - awfully wrong from the beginning, and most people knew it.
Thing is he actually seems to be a reasonable guy, smart and mainly humble enough to realize his mistakes, even though he doesnt need to admit this to the press. Actually, what he says to the press is irrelevant. The guy spent 2 months talking about Pjanic as a regista, and then he repeatedly goes with Lemina as a regista.
We still can qualify in first place, as long as he does the right things. There's a lot of quality.
However, there is an even more important lesson from this game. Asamoah isnt worth much nowadays. This leaves us with 3 useful midfielders. Than we have injured Marchisio, 2 guys who cant really contribute much in Asa and Sturaro, and Hernanes.
Our midfield situation is confirmed: its bad. Actually, very bad. Marotta & co committed a big mistake here. And I dont think Witsel or Matuidi will solve it.