Napoli parted ways with head coach Gennaro Gattuso on Monday (AEST) after the club missed out on qualification for next season's UEFA Champions League.
Shortly after a 1-1 draw with Hellas Verona at Stadio Diego Armando Maradona that consigned Napoli to finishing fifth in Serie A, president Aurelio De Laurentiis confirmed Gattuso's exit.
Napoli went into the weekend in fourth position but were leapfrogged on the final day by Juventus, who were 4-1 winners at Bologna.
Gattuso, whose contract expires at the end of June, has been linked with Fiorentina among other Italian clubs.
"Dear Rino, I am happy to have spent almost two seasons with you," tweeted De Laurentiis.
"Thanking you for your work, I wish you success wherever you go. A hug to your wife and children too."
Napoli took the lead against Verona through Amir Rrahmani in the 60th minute – a club-record 50th home league goal this season – but Marco Faraoni ensured the spoils were shared.
It spelled the end of Gattuso, who took over in December 2019 following the dismissal of Carlo Ancelotti. He led Napoli to glory in the Coppa Italia and a seventh-place finish in Serie A last season.
Napoli were surprisingly eliminated from the Europa League last 32 by Granada and missing out on Champions League qualification saw the club opt against a renewal.
Gattuso won 46 of his 81 games as Napoli boss, giving him a win percentage of 56.8 - better than Rafael Benitez (52.7 per cent) and Ancelotti (52.1 per cent) but worse than Ottavio Bianchi (56.9 per cent) and Maurizio Sarri (66.2 per cent).