Manchester United have a price for Argie star Sergio Aguero.

The Daily Mail says Atletico Madrid have told Manchester United they will not sell sublime Aguero for less than £50million.

United are said to be in talks with the 21-year-old's management company IMG and the player has indicated he is open to a move.

Sir Alex Ferguson is looking at a number of targets in his bid to replace Carlos Tevez and Cristiano Ronaldo.

And Atleti president Enrique Cerezo admits he is powerless to stop his best player leaving if a bid matches his buy-out clause, which, with taxes, is almost £55m.

United will want to knock at least £10m off that figure but Cerezo has a mandate from his board to stand firm and they are well aware that the English club will have £100m to spend when Real Madrid complete the £80m signing of Ronaldo in the next few days.

Cerezo said: "We will not sell. We have a good team and we will strengthen it in every way that we can.

"We are absolutely calm, not afraid of anything or anyone. We have contracts that we respect and we hope others respect them."