Willian says he is leaving Chelsea with “his head held high” ending a seven year spell with the Premier League club he told fans in an open letter on Sunday.
The 32-year-old Brazil winger has been linked with a move to Arsenal after he failed to agree a new contract with the Blues.
Willian rejected Tottenham Hotspur to join Chelsea from Russian outfit Anzhi Makhachkala for £30 million (US$39 million) in 2013.
He scored 63 goals in 339 appearances and won five trophies, two Premier League titles, an FA Cup, a League Cup and the Europa League.
However, an ankle injury prevented him playing in the FA Cup final loss to Arsenal and Saturday’s Champions League last 16 second leg thumping by Bayern Munich.
“The time has now come to move on. I am certainly going to miss my team-mates,” he said.
“I will miss all the staff at the club who’ve always treated me like a son and I will miss the fans.
“I leave with my head held high, safe in the knowledge that I won things here and always did my best in a Chelsea shirt.”