Calciomercato.com reports after the Arthur-Miralem Pjanic deal in the summer, the two clubs are now negotiating a possible transfer involving Coutinho.
Barça have offered the Brazilian playmaker to Juve. The need to sell in order to sign has seen the Catalan club explore the option of moving on Coutinho, the club's record signing.
Barça coach Ronald Koeman made it clear he wanted him to stay when he took over in August so it remains to be seen what he thinks of a possible sale in January.
However, Juve are not keen on Coutinho. The high cost of the deal rules out the signing, while coach Andrea Pirlo wants to place his trust in Dejan Kulusevski and not add competition in the form of Coutinho.