The centre-back will be out of contract at the Stadio San Paolo at the end of this season and negotiations for a new deal seem to have ground to a halt.

According to Sport Mediaset, Serie A sides interested in snapping up the Serbia international for free are San Siro rivals Inter and Milan.

Elsewhere, Valencia are keeping a close eye on the situation, while le10sport.com point towards Marseille as a realistic option.

Before coming to Napoli for €21m in 2017, Maksimovic had played for Red Star Belgrade and Torino, while there was a loan spell at Spartak Moscow in 2018.