It was a heavy misstep for Milan, i didn't expect it. Luckily i did not bet in this game because the opposing team really was absolutely within its reach.
Their coach, Cannavaro, was good at placing the team on the pitch and he managed to win against Milan.
Now i have not followed, do Milan have any problems to pass the turn? I think not, but if someone can confirm.
Milan wasted the opportunity in their last match to advance to R16 automatically and that is very unfortunate, because in any case in the play-off round later the chance to qualify is still not guaranteed for them. Every team they will face later will definitely fight hard, this is like a life and death match. Now we see in the play-off round which team the Rossoneri will face, if you look at the draw rules they will be matched with Feyenoord or Juventus, if I'm not mistaken.
AC Milan defense line is very bad, especially if we pay attention to the process of the first goal for Dinamo Zagreb advantage. I think the red card received by Yunus Musah at the end of the first half was another reason that made it difficult for AC Milan to win, although Sergio Conceicao squad managed to equalize at the beginning of the second half. In other words, AC Milan really threw away the opportunity to qualify for the last 16 even though they faced an easy opponent.
The additional 3 points obtained by Dinamo Zagreb did not produce any benefits, they failed to advance to the play off round even though they had the same number of points as Man City, Sporting CP and Club Brugge. The number of goals conceded by Dinamo Zagreb was too many, which ultimately made their journey stop early. While AC Milan must fight again to reach the last 16, I think Feyenoord or Juventus will not be easy to beat.