Neither Chelsea or Atletico have confirmed a deal has been struck but the Belgian said today he will be heading back to Spain.
He was quoted by media in Spain and Belgium as saying at a national team press conference in Kortrijk: "I've chosen to stay at Atletico.
"I have to continue playing and at Chelsea there's (Petr) Cech who has always been a great goalkeeper.
"At Atletico I'm sure I can play and I can continue to be the first-choice keeper of the Red Devils (Belgium).
"In the course of the season, we will see if I return to London."