Monza is not in the top 10 of the points table. Nobody expected Milan to lose against such a team. But Milan can't play very well in the away match. Milan's defense in particular was weak in this match. This is why Monza managed to score 4 goals.
However, Milan have no chance of winning the SerieA title. Now their aim is to secure a Champions League ticket from among the top four in the table and win the Europa League title.
I agree, no one thought Monza would win this match even with a score of 4 - 2. Milan players began to feel they could maintain a draw at 2 - 2 and provided several mistake that can maximized by Monza players to take this opportunity. Monza's 3rd goal proccess startubf from mistake by Milan defender that thought there would be a one-two pass, so they focused too much on the Monza players who were running to fill their positions, so that Bondo had enough space to shoot and succeeded in scoring the 3rd goal for Monza. Likewise the 4th goal where Colombo was also very free from pressure from Milan players.
This is why I have never personally enjoyed seeing a team play reluctantly after winning a game or gaining a draw before the end of the match because anything can happen. The game's possession can change in the dying minutes, even at injury time. So, I believe in those teams that remain strong regardless of the situation. Even if they are winning 2-0, they continue to fight as if they are not the ones winning. That is the kind of football that I love to watch.
I know many clubs fall victim to this particular relaxation syndrome when they are winning, maybe leading by one goal or at a draw in a tough match. What I prefer from a club is for them to remain confident and maintain their strength as if they are losing, even when they're winning. They shouldn't give the opposite club any opportunity for chances that could lead to a win. This mindset should be maintained until the end of the match, even during injury time. However, there are situations where clubs switch to a defensive game when they are ahead or at a draw in a tough match, even among elite clubs.
The truth is, Monza displayed more confidence yesterday in their gameplay because they were able to score the first two goals before Milan equalized with Giroud's goal and then the second goal, which was scored by Pulisic.
On the flip side, the Monza manager was more emotional yesterday as he dedicated the four-goal win over Milan to Silvio Berlusconi, who once owned both Monza and Milan and passed away last year. It was quite emotional and thoughtful of him; at least that will bring more fulfillment to the players.