Sarri was widely expected to be the next man in the Stamford Bridge dugout after a successful spell in Naples, where his exciting brand of attacking football helped secure successive Champions League qualifications.
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.
The 27-year-old started all three games for Senegal at the World Cup with the African nation only exiting the tournament on fair play rules behind Japan, and attention for him could now turn to his club future.
Speaking to his new club's official website, Sarri said: "I am very happy to be coming to Chelsea and the Premier League". "It is an exciting new period in my career".
Conte is now chasing his £9m pay-out for being dismissed before the end of his contract, while Sarri gets to work on pre-season.
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Club director Marina Granovskaia said: 'We are delighted Jorginho has chosen to join Chelsea.
Chelsea have chose to grant long-serving defender Kane a free transfer even though he has one year to run on his contract at Stamford Bridge.
It was of course revealed earlier today that he had signed with rivals Chelsea for £57m.
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The 26-year-old was also targeted by Premier League champions Manchester City but chose to link up with former Napoli manager Sarri at the London club.
"He was one of the most coveted midfielders in Europe and will become an important member of the playing squad".
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