His team play an aesthetically pleasing style of football nicknamed "Sarri Ball, " and his side were bitterly unlucky not to end Juve's stranglehold on the Serie A title this year having amassed 91 league points.
But a second piece of silverware in two years for 2017 Premier League champion Conte looks unlikely to save his job.
"I'd like to thank Maurizio Sarri for his valuable contribution to the Napoli cause", he wrote in a message on his Twitter account.
"He brought joy and prestige to Naples and Napoli fans all over the world with an entertaining brand of football that drew praise from all quarters".
Italian film producer De Laurentiis then announced Ancelotti's arrival with a staged photo of the pair standing back to back holding imaginary guns ready for a shootoff.
However, sources in Italy say that the 59-year-old Sarri is mulling over an offer from Zenit St Petersburg, understood to be worth around £5.2m a year.
While they would have liked to have commanded a sizeable fee for the 31-year-old, letting him leave on the cheap to get a top-class manager would be a great deal on paper.
Stamford Bridge chiefs are expected to cut ties with the former Juventus gaffer soon and immediately begin their search for Chelsea's next manager.
Despite Napoli's lofty finish, De Laurentiis had aired his frustration with Sarri - linked with Chelsea despite his fellow Italian Antonio Conte remaining in charge there - over stalled contract talks.