According to respected journalist Mathieu Gregoire, Nantes want €8m for Papy Djilobodji, which is making any deal for Marseille difficult at the moment.
OM were prepared to offer up to €6m for the highly rated centre back.
Mapou Yanga Mbiwa would be extremely difficult, with Newcastle planning now to keep the player.
Marseille are however now in the market for another central defender with the imminent departure of Lucas Mendes.
