The defender’s contract with Marseille expires at the end of the current season and he is expected to be on the move.
Both Chelsea and Liverpool have sounded the Cameroonian out, while Lazio are also keen on securing him on a free.
But now, according to Foot 365, Fiorentina have also joined the running to sign N’Koulou when his contract runs out.
The 25-year-old is currently unwilling to extend his deal and Marseille are aware they will lose him.
It is now up to N’Koulou to decide where he wants to go next summer with clubs ready to snap him up.