Milan will face Girona in San Siro in January. Then Girona can be a more dangerous team with the transfers. They should never underestimate the Spanish team in the fight they will have against them. Milan managed to get 3 points from Real Madrid by doing the hard work. I think they should get 6 points in their remaining matches and be in the top 8 teams.
I think it's not about underestimating a certain team when the next match takes place in January, because all teams will definitely make changes to their playing style and to their line-up of players who are obtained through the transfer market. So it can not only happen to Girona, but also to Milan because any team will definitely continue to monitor the players available in the January transfer market because if the price is affordable enough, of course every team will try to get them if the player has a good career in the previous team.
The real excitement in the Champions League will also be experienced after the transfer period. Because the teams that want to get into the top eight will fight hard. Liverpool is probably the only one that has guaranteed to get into the top eight yet. There is still a chance that the other teams will not be in the top eight, but I think the teams in the last 7-8 places will try very hard not to fall out of the top eight. Milan will try to get into the top eight by adding good players to the team. They are in a better position in the UCL than the Italian league.