Napoli defender Nikola Maksimovic is the subject of a bid from West Ham United.
Napoli transfer-listed Maksimovic at the beginning of the summer transfer window.
Talks with West Ham are now in progress and Napoli want €15-20m for the Serbia international.
Fulham are also believed to be keeping an eye on Maksimovic after the deal with Sassuolo for Marlon Santos collapsed.
Maksimovic has a deal with Napoli to 2021.
