New coach Patrick Vieira began work at Nice on Monday - but Mario Balotelli and Alassane Plea were both missing from training.
Mino Raiola said that Mario Balotelli would fit in well at Marseille, adding to the speculation around the Nice striker's future.
The future of the Italy international remains in doubt, but Mario Balotelli has been given a two-match Ligue 1 ban.
Jean Michael Seri's agent has urged Serie A giants Napoli to lodge a bid for his client amid interest from two Premier League clubs.
West Ham are reportedly keen on signing Marlon and could be buoyed by news that the Barcelona defender will not be loaned back to Nice.
Mario Balotelli has been linked with a return to Serie A, but Patrick Vieira expects him back at Nice next month.
Vieira will replace Lucien Favre at the Ligue 1 club.
Nice have announced the appointment of Patrick Vieira as the replacement for Lucien Favre.
Patrick Vieira's move to Nice from New York City was confirmed on Sunday.
Nice have shelled out a reported €8million to sign Danilo Barbosa from Braga.