~~~
The challenge in the Champions League is indeed much more difficult, as there are many teams that are likely much better, and to retain the trophy, Luis Enrique needs to do a lot, so it won't be easy. PSG's motivation will be high to defend the title, but considering the strength of the players currently available to other teams, it won't be easy.
Speaking of Ligue 1 there will probably never be a major challenge for them, as the strength of other teams in the league is almost unmatched by PSG, so defending the Ligue 1 title will be much easier than defending the Champions League.
Their second attempt to defend the trophy they won last season will not be as easy as their first attempt, especially since this season many teams have strengthened their squads to make up for last season's failure. Luis Enrique is indeed a great coach, but he also needs the support of his players to win the UCL trophy twice in a row.
The team's performance must always be stable, he also needs to rotate in some matches that are considered less important to maintain the fitness of the players, if something happens in his squad such as injuries to several important players, then his struggle to defend the title won last season will not be as easy as imagined.
It is clear that Ligue 1 will be theirs considering that no other team is able to provide competition in the title race, perhaps their dominance in Ligue 1 will continue for the next few seasons.