Dutch midfielder and former Swansea loanee Jonathan De Guzman has joined Serie A side Napoli from Villarreal.
Napoli confirmed the signing - for an undisclosed fee - after the 26-year-old completed a medical.
"I am happy to have come to Napoli. I can't wait to start," said De Guzman, who spent the last two years in Wales.
Napoli also confirmed the departure of 27-year-old Argentine midfielder Federico Fernandez to Swansea for a fee understood to be £8m.
De Guzman scored nine goals in 71 Premier League appearances for Swansea, as well as three goals in 17 games in Europe - including one against Napoli in a 3-1 Europa League defeat.
He was part of the Netherlands squad at the World Cup in Brazil.