Napoli announced two signings on Thursday, confirming midfielder Andre-Frank Zambo Anguissa from Fulham on a permanent deal and the arrival of Mathias Olivera from Getafe.
The Cameroon international spent this season on loan at the Stadio Diego Armando Maradona, and Napoli have taken up the option to make the move permanent for an undisclosed fee.
Zambo Anguissa joined Fulham from Marseille in 2018, making 66 appearances in all for the Cottagers.
He made 25 appearances for Luciano Spalletti's side in Serie A this season, recording two assists.
The Italian club also confirmed the signing of Olivera from Getafe, with the Uruguayan left-back having made 119 appearances during five seasons in Spain.