Courtois has spent the past three seasons on loan at Atletico Madrid and played a pivotal part in their success last season, with Diego Simeone's side winning La Liga and reaching the Champions League final.
He played against Chelsea, his parent clu , in the semi-final of Europe's elite club competition but said that a move back to Stamford Bridge could be best for his career.
He told Cuatro: "We will talk after the World Cup, we'll talk with Chelsea. I'm very comfortable here, I love living here, but at times you have to think about the sporting aspect. We'll see what happens, I can't say right now. First the World Cup."
Courtois previously admitted that he felt no "emotional connection" with the London club.