PSG will be under even greater pressure in this season's Champions League. We saw their weakness in the Club World Cup final when Chelsea defeated them 3-0. This season, of course, the stronger teams will be PSG's main competitors in defending the UCL trophy.
Although Chelsea defeated PSG in the Club World Cup final, I'm not confident they can reach the Champions League final this season. I still have confidence in Barcelona; they performed better last season, and their overhaul in the transfer market will open up opportunities for them to compete for the title this season.
For next season everything will be different and for what happened in the Club World Cup I think it can't be used as a reference anymore but it must be admitted that for PSG it won't be easy next season because defending the UCL title is very difficult but I think apart from that the PSG team still has to be watched out for, I don't see their shortcomings after losing to Chelsea in the Club World Cup final, that's a normal thing for a team when they can't perform at their best.