The 26-year-old has joined the Ligue 1 club on loan from Napoli until 2022 with an obligatory €12million buy option.
The Poland international joined the Partenopei from
for a reported €35m in 2016, although his
career was hampered with knee injuries, he was able to attract interests from big clubs such as
decided to join
, who sit sixth in the Ligue 1 table. According to reports, a permanent deal would be an initial €8m plus €4m in bonuses.
"I am happy and proud to announce that I am officially a player of Olympique de Marseille, one of the most prestigious clubs in Europe,"
wrote on Twitter.
"I'm ready for this new adventure. Allez OM."