Marseille confirmed their first signing of the January transfer window after completing a deal for Montpellier midfielder Morgan Sanson on Tuesday.
The versatile Sanson will undergo a medical on Wednesday after Marseille agreed to pay €9 million, plus €3m in bonuses.
The 22-year-old signed for Montpellier in 2013 for a reported fee of €700,000.
He has delivered three goals and five assists this season in Ligue 1, though it's unclear whether he will play against Montpellier on Jan. 27 at the Stade Velodrome.
Sixth-placed Marseille, already 15 points behind league leaders Monaco, are also expected to strengthen their fragile defence during the transfer window.