Chelsea manager Jose Mourinho's £35m move for Diego Costa could hinge on whether current Atletico Madrid loan star Thibaut Courtois is included as part of any summer swoop, according to The Metro.
Mourinho has made no secret of his desire to sign a top quality centre forward ahead of next season, with the current crop failing to meet the demands of chasing trophies on multiple fronts.
Blues forward Fernando Torres has in particular faced staunch criticism over the last few weeks, thanks to a paltry return of four Premier League goals so far this term.
Despite the relative success of veteran strike signing Samuel Eto'o this season Mourinho wants to splash the cash on Costa, with the Atletico star in stunning form and providing the kind of physical presence and proven track record of clinical finishing that has been sorely lacking at Stamford Bridge.
Costa's fantastic return of 25 goals in 30 La Liga games this season has top clubs across Europe cueing up to meet his £35m release clause.
Atletico boss Diego Simeone is desperate to keep his best player though, but if he is finally forced to admit defeat in that fight would like something in return, targeting the permanent signing of Courtios as a worthy make-weight to smooth over the proposed move.
The Belgian stopper is under contract with Chelsea until 2016, but is not interested in going back to the Bridge next season if its to sit on the bench behind current number one Per Cech.
Former Atletico striker Torres has been mentioned in connection with a Vicente Calderon homecoming in recent months, but Simeone would much rather keep Courtois permanently and wants him included in any bid Chelsea lodge for Costa at the close of the campaign.