"After speaking to Cholo (Simeone) and Miguel Angel, I wanted to speak to the fans that have always supported me," the forward said in a video posted on Atletico's Twitter account.
"I've chosen to explore new challenges. It's been a tough decision to make, but it's what I feel I need," the World Cup winner said, addressing Colchoneros fans.
Sources close to the club told EFE that the 28-year-old Frenchman will formally terminate his contract with Atletico on June 30, when the price tag for his release clause will drop to 125 million euros ($140 million).
Atleti boosted the fee to 200 million euros ($224 million) last summer when Barcelona expressed interest in Griezmann, who ultimately opted to remain with the Colchoneros, a choice he announced in a television documentary, "La Decision."
"I want to thank you for all your support throughout these past five years, winning my first trophies as a professional," he said in the message to Atletico supporters. "I will always remember you, I will always keep you in my heart. It's never easy for a player to express all these emotions, and I just wanted you to know as soon as possible."
Juanfran, who turned 34 on January 9, declined the one-year contract extension the club offered him, opening the door for a new stage in his career, sources told EFE.
The former Spanish international played in a total of 29 matches across all competitions this season.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)