The Belgian goalkeeper has been on loan in the Spanish capital for two-and-a-half years, and in that time has established himself as one of the most talented young goalkeepers in world football.
He was the star of the show once again as Atletico came away from their first leg quarter final tie against Barcelona in the Nou Camp with a 1-1 draw, whilst Lionel Messi failed to beat him for the fifth game in succession.
Barcelona manager Gerardo Martino admitted after the game that Courtois looked like ‘one of the best goalkeepers in the world’, whilst Atletico boss Diego Simeone insisted he is only going to get better.
“He has improved a lot in the two and half years that he has been with us,” the Atleti coach told reporters.
“He needs to keep getting better but it is clear that he is destined for big things.”
Courtois has admitted previously that he sees his long term future in the Premier League, but Chelsea boss Jose Mourinho is reluctant to drop Petr Cech just yet.
The Czech international is still just 31-years-old, and has been outstanding once again for Chelsea this year.
However Courtois is expected to extend his deal at Stamford Bridge until 2019.