PSG are just very lucky that they have one of the most comfortable draws in this stage. However Real Sociedad are still a team not to be underestimated. Because they finished their group as the leader and there was Inter in that group as well. Inter are currently performing much better than PSG in the Champions League.
Therefore PSG had better get well-prepared for this matchup. Otherwise I won't be surprised to see them being eliminated. In the end PSG were nearly finding themselves in the Europa League if it weren't for Milan's comeback against Newcastle.
