Sarri arrives at Stamford Bridge after three impressive years at Italian club Napoli, but will take over at a club facing an uncertain future at boardroom level following Roman Abramovich's United Kingdom visa issues.
Former Napoli boss Sarri, 59, has signed a three-year contract, while Italy global midfielder Jorginho, 26, has signed a five-year deal.
Club director Marina Granovskaia added: "We are delighted to welcome Maurizio and are looking forward to him bringing his football philosophy to Chelsea".
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The transfer window will slam shut on August 9, meaning Chelsea will have to work quickly to bring in Sarri's targets.
But Sarri's first words after being unveiled Chelsea manager has got fans excited.
Chelsea FC finished in fifth spot in the Premier League table last season to miss out on a Champions League spot.
The statistics will also show that Conte's Premier League win rate as manager (67 percent) is second only to Manchester City's Pep Guardiola (72 percent) of those in charge for at least 20 games.
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The midfielder - one of the best young players in France - will quit Paris Saint-Germain and sign a five-year deal at City.
Sarri, a former banker, said he would be starting his new job "and meeting the players" on Monday ahead of Chelsea's pre-season Australia tour. If Conte receives the £9 million that he is entitled to if he does not work next season, it will take Chelsea's spending on...
Martusciello will remain in Italy at Empoli working under Luciano Spalletti, while Gotti is set to exit Italy for the first time in his coaching career and end a seven-year working relationship with Roberto Donadoni.
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