Chelsea are keen to tie up a deal for Atletico Madrid striker Diego Costa before the World Cup, according to widespread reports.
The Premier League club have tabled a formal bid for the Spain striker, whose 36 goals helped fire Atletico to the La Liga title and take them into the final of the Champions League, where they were beaten in extra-time by city rivals Real.
The Brazil-born forward, 25, who will play for Spain this summer at the World Cup is reportedly keen to move to Stamford Bridge, with Chelsea looking to push through a deal, believed to be around 32 million pounds, as quickly as possible.
"Chelsea have made an offer to Atletico Madrid in compliance with the buyout terms in Diego Costa's contract, and have been advised that the player has provided notice to Atletico Madrid invoking the buyout clause and directing the club to accept Chelsea's offer,'' a club source confirmed to Press Association Sport.
"Chelsea look forward to entering into formal transfer documentation with Atletico Madrid as soon as possible so that the player can concentrate on the World Cup.''