The Italian took over from compatriot Antonio Conte last month after almost wrestling the Serie A title from Juventus with old club Napoli last season. I'm happy to be at Chelsea.
The 26-year-old has a year to run on his current contract and has been continually linked with a move prior to Thursday's transfer window, with Real Madrid rumoured to be his most likely destination if he is sold.
He would have provided competition for Fernandinho at the base of City's midfield, but Sarri feels the quality Guardiola possesses throughout his squad meant Chelsea's need was greater.
Digne also revealed he has tried to tempt his former Barcelona team-mate Yerry Mina, who has been heavily linked with a move to Manchester United, to follow him to Everton.
"I am not happy about this situation but before I answer, I would like to speak to him". "The important thing is to be ready for the new season".
Chelsea won the Premier League in 2016-17.
The Brazilian made his return to action for the "Blues" on Sunday, coming off the bench in their 2-0 defeat to Manchester City in the Community Shield.
Although Chelsea endured a disappointing campaign last term, Willian was regularly a standout performer and was named Players' Player of the Year for a second time by his team-mates.
"I don't know if he will be able to play on Sunday, but he has nothing serious", Sarri said. "I feel good after three days of training, of course I am not my best performance, my best condition". I spoke about positions and characteristics but no names. "But only maybe one player". Because it is very important to have a trophy immediately. Since being appointed as Antonio Conte's successor at Stamford Bridge this summer, Sarri has yet to work with Courtois and five other players given extended breaks after the World Cup, including Eden Hazard and N'Golo Kanté.