PSG took control of the round 16 tie with a 5-2 first-leg win at the Parc des Princes.
Fofana told reporters in the mixed zone afterwards: "It's nothing new. I think everyone knows it. Last year, they were European champions, and that's not for nothing.
"They have a Ballon d'Or winner, they have Ousmane (Dembélé), who is among the best players in the world, even now, even though he's coming back from injury. So yes, for sure, they are great players, they only have great players."
He also highlighted the decisive impact of Khvicha Kvaratskhelia's introduction into the match, who sealed PSG's victory with two goals.
"And we saw it, they bring on another great player (Kvaratskhelia). He hurt us, he scores two goals. Was it a difficult moment? Physically, we were struggling because we pressed a lot, we tried to go man-to-man throughout the match, but they are a great team. Tonight, they showed that, so hats off to them."