We can see that 3 AC Milan matches (besides their match against Barcelona) ended without a win in Serie A, and what's even sadder is that they got it when facing someone who was not better than them in terms of strength. In the first match they had to be satisfied with a draw, in the second match they had to suffer a defeat and in the last match they had to feel another draw. This is a start that is far from satisfying.
In the next match they will face Venezia who is one of the clubs promoted to Serie A this season, if they get bad results again in this match, then their confidence will decrease. Moreover, it will shake their mentality which will then face Liverpool in the Champions League.
Because AC Milan does not have to be this bad and I also think it is likely that his mentality will be hit further if he loses to this new Serie A challenger, but what we cannot imagine is whether Fonseca deliberately hides his strength to be able to focus on the Champion League alone.