Zuniga was expected to sign a new contract, but has been linked with interest from Turin.
"We'll see what happens over the next few days, but there will probably be some news," agent Riccardo Calleri told TuttoJuve.com.
"At the moment it is difficult to take a stance and hypothesise scenarios. Certainly all avenues are open, from a renewal with Napoli to an eventual departure.
"He is an important player who has done very well in these years. Juventus? At the moment I don't want to step off the fence with regards to Zuniga's future..."