The Brazil international has enjoyed a successful five years at Stamford Bridge, but the playmaker has been heavily linked with an exit before August 9.
However, Willian has revealed that he is "very happy" with life at the Blues and is excited to work with new head coach Maurizio Sarri, despite alleged interest from Manchester United, Barcelona and Real Madrid.
The 29-year-old is quoted by Sky Sports News as saying: "I've always made it very clear that I've always been very happy playing for Chelsea. I never said that I want to leave the club.
"This is a new era, with a new manager and I've had a very good conversation with him, so I hope we can enjoy a lot of victories."
Willian could not prevent Chelsea from succumbing to a 2-0 defeat to Manchester City in the Community Shield on Sunday.