The Belgian stopper is on loan at Atetico Madrid for the third successive season and has been immensely impressive once again for the title challenging capital club.
Rivals Real Madrid have now stepped up their efforts to sign the goalkeeper permanently in the summer though and have the capability to outbid Atletico above the £30million rated value of Courtois.
Jose Mourinho admitted last week that he may have to let some fringe players leave the club for the right fee in the summer to balance the book.
The Blues spent big again in January and are set to cash in over the summer in order to make the FFP criteria which has been a long-awaited issue at Stamford Bridge.
The 21 year old has the rest of the season and a World Cup at the end of it to enhance his reputation even further and with Petr Cech not looking like he is coming to the end of his career, Courtois isn’t looking like being first choice at Stamford Bridge next season.