Insider: Chelsea midfielder Willian has already undergone a medical at Arsenal.

Departing Chelsea midfielder Willian has already undergone a medical at Arsenal.

The Brazilian announced his departure from Chelsea on Sunday after seven years at the club ahead of his imminent move to the Gunners prior to the 2020-21 campaign - which begins on September 12.

The London Evening Standard says the Brazilian forward had his medical with the north London side as his transfer nears completion.

Willian is expected to sign a three-year contract with Mikel Arteta's side - where he is set to earn around £100,000-a-week.

Chelsea were hopeful of keeping 32-year-old Willian, but club director Marina Granovskaia was only prepared to offer him a two-year deal, which the Brazilian rejected