The Scottish champions face a fight to keep the €15m-rated French midfielder amid interest from the Ligue 1 club
Celtic midfielder Olivier Ntcham has revealed he wants to leave the club for Marseille as he doesn't believe he can progress playing in the Scottish Premiership.
The league champions rebuffed interest from Porto before the start of last season, however it appears their resolve will once again be tested after the 23-year-old outlined his desire to leave Scotland in search of a fresh challenge.
The former Manchester City man has named France, Germany and Spain as potential destinations following two seasons in Glasgow.