Atletico Madrid president Enrique Cerezo has declared they want to buy Diego Costa back from Chelsea.
Atletico plan to use the €42 million raised from Jackson Martinez's sale to Guangzhou Evergrande to land Costa.
"Diego is a great player, but he belongs to Chelsea," said Cerezo.
"We will try to do our best and see what the club says, his arrival does not depend on us.. we always want the best players and Diego Costa is one of them."
On Martinez, Cerezo added: "Guangzhou is a good club, he will make them a great team as they strive to be the Chinese champion.
"Here the truth is that Jackson was not poor. It was the height of circumstances."