We all know that defending Champions League isn't an easy task, if they want to compete at highest level they need to manage players well being, this will help from abstinence of injury as well, most especially on their key players.
PSG is a very good team, but of course defending the title is one of the things that can cause a lot of pressure, in this aspect PSG must act intelligently, Luis Enrique wants to do what he does again, repeat history, he wants PSG to be a very good team and win Ligue 1 and the UCL, they can do it, but it is not easy.
PSG has two titles to defend and their coach is a good manager who understands how to manage his players to avoid certain injuries that may affect their performance and make them no to compete in the tournament very well this season, defending the league title will not be mush difficult for PSG but they need to be more than good to be able to repeat what they did last season. The UCL is not going to be easy because most of the other teams are looking very good now so for PSG to win the champions League competition again they have to do more than they did last season.