Arkadiusz Milik’s agent is in Italy, as Napoli reportedly want €15-18m to sell the striker, who will be out of contract in July.
The forward has been frozen out of the squad since refusing to sign a new deal over the summer, as a transfer to Roma broke down at the last minute.
He risks losing his place in the Poland squad for the rescheduled Euro 2020 tournament, so needs to find a new club in the January transfer window.
Despite the possibility of losing him for nothing in July, Napoli are reportedly still holding out for €15-18m to sell Milik.
Juventus remain the favourites, according to Goal.com, although there is also interest from Atletico Madrid and Tottenham Hotspur.
Milik could begin negotiations with a new club from February.