Atletico Madrid general manager Miguel Angel Gil Marin has said star striker Sergio Aguero will not be heading for arch rivals Real Madrid.
Argentine international Aguero, 22, has openly declared his desire to leave Atletico and hinted his destination could be Spanish capital neighbours Real.
But Atletico are standing firm and insist the player's buy-out clause of €45million (£39m) was the asking place for everyone - apart from Real Madrid.
"He (Aguero) is not going to go to Real Madrid," Gil Marin said in El Larguero.
"I called (Real president) Florentino (Perez) to ask him if we could maintain this commitment to not being hostile and he agreed.
"Either a club, that is not Real Madrid, comes in and puts €45m on the table or he stays at Atletico Madrid. We don't want to negotiate with anyone."
English trio Manchester City, Chelsea and Liverpool have all been linked with Aguero, but so far Juventus are the only side to officially register their interest.
"Atletico Madrid don't have any offers, only a fax from Juventus saying they want to negotiate," Gil Marin said.
"It is a letter saying they are keen to negotiate, but Atletico don't want to negotiate."
Atletico want an end to the saga within the next fortnight and have set a 15th June deadline to conclude any deal.
"We want a decision before 15th June because it is a decision that has huge implications on our sporting plan," Gil Marin added.