Chelsea are intensifying their pursuit of Atletico Madrid striker Sergio Aguero.

The Mirror says the 21-year-old Argentine international has been persistently linked with a move to west London and Chelsea have stepped up their efforts after missing out on Kaka and David Villa.

Atletico president Enrique Cerezo appeared to deliver yet another blow to the Blues' summer plans earlier this week when he maintained that Aguero would not be leaving at any price.

But Cerezo admitted yesterday Atletico could sell their prize asset if they received an offer too good to refuse.

He said: "We will open talks if an interesting offer is made. Many people have spoken about Aguero but the truth is Atletico have not been contacted by any suitor."

That could also alert Manchester United as they look to fill the void left by the departure of Cristiano Ronaldo.