From a contract at the end of June, De Bruyne would have accepted a contract offer from Napoli, says La Gazzetta Dello Sport.
Napoli has offered De Bruyne a two -year contract with conditions just below what he earns with City.
The Belgium International has introduced proposals from all over the world, but Napoli is now sending the veteran to land.
After seeing his team winning the Scudetto last night, Napoli President Aurelio de Laurentiis refused to deny that De Bruyne would arrive as their first summer signature.