Antoine Griezmann has left the door open for a move to Manchester United next summer despite signing a new contract with Atletico Madrid, in an interview with FourFourTwo. A proposed move to Old Trafford this summer collapsed after the Court of Arbitration for Sport upheld Atletico Madrid's transfer ban. United, meanwhile, cooled their interest in the Frenchman to focus on signing an established centre forward to replace Zlatan Ibrahimovic, who has been released. Despite penning the new deal, Griezmann's buy-out clause remains at €100 million. Sources have told ESPN FC that United still hold a significant interest in the 26-year-old, and Griezmann says he does not know what will happen beyond next season. He said: "To be honest, I don't know. I'm going to be playing for Atletico next season and after that we'll see. All I am thinking about now is Atletico Madrid. "I think it's absurd to talk about something that is more than a year away."