I am predicting a full time draw. Chelsea has a good defense and that can be used to their advantage. PSG has a more balanced team but if Chelsea can build a strong wall in their defense they might take the game to penalties and use that as an edge to win the trophy but if they hope on scoring within 90 - 120 mins I doubt if they will withstand the heat and attack that will come from the Paris team.
This is one difficult prediction in this final. A full time draw doesn't seem to be impressive, in the first half PSG should be the ones leading the score line, Real Madrid conceded two early goals in the first 10 mins, if Chelsea should allow themselves to be scored like that i don't think they have what it takes to equalize before 90 minutes is over.
Chelsea also have a problem if they score before their opponent, they become very relaxed, instead waste other opportunities that comes. PSG are better in defense, midfield and forward, Chelsea only have to put in effort and see where it takes them.