Rafael Benitez is expected to complete his first signing as Napoli manager later this week.
PSV Eindhoven winger Dries Mertens has been linked with a number of clubs over the summer but it appears that he is on the verge of signing for the Italian side.
And the 26-year-old Belgian is expected to sign a five-year deal before the weekend.
Speaking to Dutch paper De Telegraaf, the player's agent revealed that the deal is close to completion.
Soren Lerby said: "Napoli and PSV almost reached an agreement. And Dries agreed on 99% of a five-year deal."