Chelsea are plotting a sensational swap deal involving Thibaut Courtois and Manchester United and Arsenal striker target Diego Costa.
According to the Daily Star, the Blues are ready to give up Courtois, who is currently on loan at Atletico, in exchange for the Spanish side's top frontman, Diego Costa, and cash.
The Belgian stopper has been hugely impressive in his three years at the Vicente Calderon.
And while Chelsea view the 21-year-old keeper as the natural successor to Petr Cech, Courtois has made it clear he doesn't want to sit on the Stamford Bridge bench and wait his turn.
As a result, the report suggests Jose Mourinho could use Courtois as leverage to secure his top summer transfer target.
Costa, who has been linked with Arsenal and United, sits second in the La Liga scoring chart with 19 goals so far this term.
Liverpool have also been mentioned as suitors for the Brazil-born star, but Chelsea hold the trump card in Courtois.
Another potential advantage for the Blues over Premier League rivals Arsenal and United is the fact that Costa and Mourinho share the same agent, Jorge Mendes.