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.