PSG missed out on top spot in Group A, while Napoli topped Group B and PSV Eindhoven crashed out of Europe.
We examine the permutations for each side for matchday six of the Champions League group stage.
Napoli scored twice in the opening five minutes en route to a 3-0 victory over Inter Milan at the Stadio San Paolo.
Inter Milan held on to beat 10-man Fiorentina 4-2 and hand boss Stefano Pioli his first win since taking charge.
All the latest transfer talk as Manchester United reportedly lead the race to sign £30m-rated Lazio defender Stefan De Vrij.
Kevin Gameiro and Antoine Griezmann scored the goals as Atletico locked down top spot in Group D with a 2-0 victory over PSV.