Moussa Sissoko has told Newcastle United teammate Florian Thauvin to "stay and fight".
Thauvin is a target for Olympique Marseille this week.
Sissoko told Telefoot, "I do not know what is the best solution for him, it's not going very well for him, I know it's not easy, but I told him to hold on and fight.
"If he has the opportunity to go and play in Marseille, if he goes there, it will do him good.
"Whether to stay in Newcastle, I will tell him to fight and to do everything to change this situation."