OM are formulating a €20 million move for the Colombia international, who would be cup tied in Europe if he was to play on Thursday
Carlos Bacca has been left out of AC Milan's Europa League clash with CSU Craiova amid talk of a move to Marseille.
Bacca did not feature in Milan's 4-0 win over Bayern Munich on Saturday and coach Vincenzo Montella said afterwards that the Colombia international would be omitted for the third qualifying round meeting with the Romanian side because of "future transfer market moves".
And Montella has stayed true to his word, leaving Bacca out of the 20-man squad for Thursday's first leg.