Internal conflict between players, players and coaches, players and spectators or others, it will disrupt the harmony of a team which will ultimately affect their game or cooperation on the field.
Yes, maybe we just need to say they have to be professional, that's true, but the problem is it won't be that easy to do because they also have an ego which is actually one of the things that is difficult to change from a player.
Well, it seems like they realize that now. There is no problem whether they have star players or not, the most important thing is that they can manage it well so that there is no conflict.
It is big problem for any club or national team and decades ago when Manchester United, Arsenal and Chelsea, Liverpool competed tightly in Premier League with a famous term Top Four, there were negative impacts on England national team in World Cup and Euro tournaments. I remember perhaps it was revealed years later by Rio Ferdinand.
It was more serious in PSG years ago because of their transfer and salary policies that give newcomers and new super star players many privileges and power on field and in dress room. They did not succeed by allowing this toxic behavior from Neymar then Mbappe, finally they realized it two seasons ago and started their new era. Their success in this season shows that t
decision and their new strategy are very good and rightly.