Newcastle are considered to be the most inexperienced team in Group F. This team is new to the Champions League platform. However, they are now top of the table. They got a great win against PSG. I thought the match might be competitive. But in the match we saw the dominance of Newcastle players. After sharing the points against Milan in the away match, the team got a great win in the home match.
However, Group F has become more competitive. Milan have drawn both of their matches. On the other hand, the Dortmund team is strong but they have earned only 1 point in two matches. Milan and Dortmund will surely battle it out in their next match to climb the table. Every match in Group F will be very competitive.
There is something more important to this win and that is the margin by which they won. If they end up being equal in points with PSG and they share rank 2 and 3, the direct comparison will decide which team will advance to the next stage in the Champions League and which team will be relegated into the Europa League. Winning 4-1 can be so important because PSG would have to beat Newcastle at least 3-0 to then have the goal difference decide about the order in the table. I think that's one reason why this defeat is really bad for PSG. It raises the pressure even more for the next games.
You are right. PSG lost by a big margin. And in this they may face problems. PSG lost the away match by 4-1. It is unlikely that PSG will win the home match by 3 goals. As I have seen Newcastle's gameplay, it is very difficult to beat this team by 3 goals. Because even when Newcastle play attacking, they never leave their defence vulnerable. The team has not been in good form in the Premier League at the start of this season. Even then, they conceded only 7 goals in 7 matches.
However, I think Newcastle and PSG are more likely to qualify for the knockout rounds. I had higher expectations from the Milan team. But their performance is a bit slow. They probably want to focus entirely on Serie A.
Milan's performance will be at a level that can increase over time. Even though they seem to be a little behind for now, they still have a chance to get out of the group. The Newcastle matches will be decisive for them. They drew in Milan in the first match, but they must beat them in England. Milan is also a team that can win against PSG. They just haven't shown their strength yet.