Allegri isn’t really that adaptable. We enter every big game with roughly the same gameplan:
1. Press high and hard up the pitch in the first 20-25 minutes, this is when absolutely have to nick a goal for our gameplan to work
2. When the players are tired, we retreat in our own half and resort to counterattacking tactics.
3. We always concede possession, even when we had an amazing midfield in 2015, we could only maintain 39% possession
This is how we play every big game. High intensity at the start, then a drop off when fatigue hits 25 minutes into the game, and I never expect us to have possession.
This tactic works against Napoli, earlier this season beat them 0-1. This is because Napoli does not have the forwards to hurt our organized defence. However, when we face an elite team like Bayern/Barca/Real, this tactic usually fails because they have the tools to break us down.
Allegri may be juggling between formation, but his tactics remain the same. If we play one of the elite teams in the later stages of the CL this season, I fully expect the same gameplan as per usual.