The 21-year-old goalkeeper has earned rave reviews in Spain this campaign after a series of impressive performances at the Vicente Calderon Stadium, and the Belgian international has revealed his desire to continue his development by playing regular first-team football in 2013/14.
Courtois signed for Chelsea from Racing Genk in 2011, but has spent the past two seasons on loan at Atletico Madrid.
He's seen as the long-term successor to Petr Cech, but the talented youngster has progressed far quicker than anyone expected, and has put pressure on the Blues to start considering him for selection.
However, if he's not going to be in contention for a place in the starting XI, then Courtois has made clear his feeling that it will be more beneficial to return to the Spanish capital.
"I like the Chelsea project with young players very much. In two or three years Chelsea will have a team to win everything.
"I want to stay. I'd rather play in La Liga than be a substitute in the Premier League.
"There's a World Cup and I want to go. Here I will be able to play in the Champions League and there's no better place to play than here. At Atletico I have progressed a lot."