A double from Luis Suarez helped the Spanish side to a 3-1 victory in the Parc des Princes, with Gregory van der Wiel’s deflected cross giving the French side just an element of hope going to the Camp Nou.
PSG at the very least have to score three times away from home in order to have a chance at qualifying, something which they have managed in their last three away games against Marseille, Nice and, technically, Bastia in the Coupe de la Ligue final.
However, they would have to match the results that they had against Nice and Montpellier away from home this season if they wanted to progress and the task of beating Barcelona can’t be compared with the results against those two sides.
Only once since May 2013 have Barcelona failed to score at the Camp Nou while conceding more than once. Their opponents that day were Bayern Munich, and it will take a monumental performance from the Parisians to match the Germans' feat.
PSG do welcome back both Zlatan Ibrahimovic and Marco Verratti to the first-team after suspension, but they will need to be at their very best to stand any chance.
Even then, it might not be enough to turn the game around. All PSG can hope for is it save face and show the rest of Europe that they can compete on a consistent basis, proving that last week was a blip.