According to Rai Sport, Napoli and Marseille have reached an agreement for the transfer of Arek Milik who will undergo his medical tests with the Ligue 1 giants on Thursday.
The contract of the Poland international expires at the end of the season, but Marseille have reached an agreement to sign the 26-year-old in the winter transfer window.
According to Rai Sport, Milik will move to South France on loan with an option to buy, therefore he will have to extend his contract with Napoli before completing his move to the Stade Velodrome.
Marseille will pay €9m plus €4m in add-ons and with a 20% sell on clause included in the agreement.
The player has already agreed personal terms with the Ligue 1 giants over a €4m-a-year deal.
The former Ajax forward is expected to undergo his medical examinations with Marseille on Thursday.