Atletico Madrid will reportedly demand Chelsea include Romelu Lukaku on loan as part of a deal for Diego Costa - as manager Diego Simeone believes the Belgium international would be the perfect replacement for the Spaniard.
Recent reports in both the Spanish and English press have claimed that Costa is set to move to Stamford Bridge at the end of the season after the Blues agreed to meet his £32m release clause.
And Spanish newspaper AS claims that Atletico are trying to take advantage of the close relationship between both clubs and demand Lukaku joins them for a season.
The La Liga side are confident of securing a deal for Lukaku as the striker shares his agent Christophe Henrotay with Chelsea goalkeeper Thibaut Courtois – who has been on loan at the Vicente Calderon for the last three seasons.
Lukaku has spent the season on loan at Everton scoring 15 goals in all competitions but reports claim that he is still out of Jose Mourinho's plans.
Chelsea are reportedly set to offer the striker an extension to his current contract in order to secure his long-term future – before letting him leave on loan for a third consecutive season with hope of seeing his value increase again with the view of selling him in the summer of 2015.
Meanwhile, Lukaku's agent recently confirmed they were waiting to learn of Mourinho's summer transfer plans before making a decision.
"For the moment, Romelu belongs to Chelsea. He has two years left on his contract. It's going to depend on Chelsea. After that, we'll see together what the best options are if Chelsea decide to let him go," Henrotay said.
"That they want to bring in a big-name striker has been well‑documented. But Chelsea need lots of great strikers. And if there are too many, they'll choose to allow Romelu to leave. But if they think there aren't enough forwards, perhaps Romelu will say, 'I'm interested in prolonging the adventure'. But it's still too soon."