Barcelona vs. PSG is a battle of the heavyweights, even if neither are leading their respective leagues. Neymar is out, Messi is being courted to come to Paris, and Kylian Mbappe is facing a depleted Blaugrana backline. The real question comes down to tactics – how will Mauricio Pochettino and Ronald Koeman set up their squads? If history is any indication, it won’t matter too much, because this fixture always sees fireworks.