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.
Girona is almost certain to be eliminated from the Champions League because they were only able to collect three points and in terms of experience, the results obtained by Girona when competing in the Champions League did not show any readiness at all. There will not be many changes for the existing teams because in the Champions League, experience may be needed and for teams that are not favored, they may have the same chance even though they recruit several players in the transfer market.
Milan still has a chance to qualify for the next round, but they need to work harder because to qualify for the next round by relying on the play-off route, they also need to see the results of several competing teams, but if you look at the points they have, the chances are still quite large.