The agent of Dries Mertens insists he's committed to Napoli.

The Belgium winger has struggled for form this season.

"Mertens is calm and happy to stay at Napoli," Soren Lerby assured Radio CRC.

"My client wants to stay until at least the end of his contract, which is in 2018. There's no problem with the club or his teammates.

"Mertens also has relatives in Naples at the moment."