The 21-year-old stopper has still to make his debut for the Blues following his loan move to Atletico since he joined the Chelsea in 2011.
The Glovesman is currently serving his loan spell at Atletico Madrid for the past three years – with his impressive performances in La Liga, it has been reported that the top clubs with the likes of Barcelona and Real Madrid are keen on the Belgium international.
The report claims, Real Madrid head coach Carlo Ancelotti is desperate to lure the Chelsea stopper to the Bernabeu in the summer transfer window for a long-term replacement of captain Iker Casillas.
Having 14 caps for his country, Courtois is likely to secure his place as a part of the Belgium squad for the World Cup 2014 in Brazil.
Courtois still has two seasons left on his contract with the Blues. It will turn out to be the most interesting transfer of this summer, if Madrid would able to grab the services of Courtois from the West London club.