The 26-year-old is into the final year of his contract at Napoli and he is yet to sign an extension.
That has alerted the likes of Manchester City, who are in the market for a new left-back this January after Benjamin Mendy injured his knee.
But, according to Calciomercato, Juventus are the ones leading the race for Ghoulam.
The Italian champions want to sign the Algerian on a free and are prepared to wait it out until next summer.
Napoli, meanwhile, are expected to continue negotiations with Ghoulam in the hope a deal can be struck.