Napoli have signed Pierluigi Gollini on-loan with an option to buy from Atalanta.
The Italy goalkeeper had been on-loan with Fiorentina.
Gollini, 27, conceded eight goals in nine appearances in Florence, keeping four clean sheets.
As Gollini leaves, Fiorentina have signed Salvatore Sirigu from Napoli in a permanent deal.
The 36 year-old arrives after acting as cover for Alex Meret at Napoli.