AC Milan vs Borussia Dortmund will going to be a strong battle for the both teams, because AC Milan will be using home advantage to play so that they can improve higher in the group F, and Borussia Dortmund will be fighting to maintain first position in the group F, because if they lose in this match PSG will take over the first position. I don't think AC Milan can achieve victory from this match, because Borussia Dortmund came into this champions league competition with potential players that know what to do to make things work together for the favour of the team. PSG have the opportunity to defeat Newcastle united 3-1 for the favour of PSG, and their coach is fully ready to make this match a favourable match to their team.
I still won't underestimate AC Milan if they accept their game at home, it could create a different atmosphere for the hosts and for Dortmund they need to strengthen their mentality. Nothing is easy when playing at your opponent home ground even though it is considered a weak club. So AC Milan will risk everything they have experienced players so they can create resistance. I know that Dortmund this season will be more determined so it will be very appropriate to be faced with a club that is currently risking everything.