In the last season Champions league, psg had those three star players and yet they lost out. It is not about having three super players but will they play in harmony?
Even if they do, does the club have good midfield and defence?
Champions League as the name says is for Champions and not local league. Many unexpected wonders do happen in the league.
So, psg should not feel relaxed because they have best attackers in their best form.
Big mistake if they don't think it's an important game and they relax. Confidence they must have, but don't let the confidence they have keep them from trying to train the best possible tactics for them to apply in the match later.
The attackers owned by Paris Saint Germain are very good attackers and everyone recognizes that. But I agree with you, even when they have a very good attack line but not supported by a good midfield and defense it will be useless.
In my personal opinion, Manchester City has the best team in England and Europe for the last few years, they are led by a coach who has won the Champions League with Barcelona many times, but Manchester City still failed to win the Champions League even though they tried everything they could.
The owners of PSG also invested a lot of money and time to bring the biggest stars to their team, Mbappe, Neymar and Messi but they also failed to win the Champions League, even though it is their biggest desire.
On the other hand, Real Madrid has won the Champions League several times in recent years, although they were never the main favorites.
It's really hard to explain what it takes for a club to win the Champions League, what is the x-factor. In my opinion, it's about the compactness of the team, the unity of the team and the confidence and great mental strength.