The transfer window has a long way to go until it closes, so we can't assume Napoli will or can keep hold of key players. After all, when the transfer window is about to close there will usually be a lot of transfers going on, so for now I think it's normal for them not to be too hasty. Because it's possible, they still don't share actual information, because it seems impossible for players who have had a big impact in the previous season not to be in demand by other big clubs.
Window transfer open on Wednesday 14 June and close until Friday September 1, looks has two months left before summer window transfer close and still any possibilities with Napoli key player extend or joining with other team. Firstly, Napoli leave by their key player Kim Min-jae after joining with Bayern Munich. Crucial situation with Napoli because not extend contract with Spaletti and has many possibilities with their key player leave the team. Napoli should extend their key player success won Scudetto in this season if want defend or keep on the top fourth standing position in next season or they will face difficulty with new formation for next season.