The Argentine playmaker has been the subject of transfer speculation this summer, with as many as five clubs interested in him.
Pastore won't come cheap though, with Zamparini saying the Serie 'A' side will not be willing to let the player leave for less that £45.1 million (€50m).
"The situation of (Javier) Pastore is in the hands of his agent. We must solve it within 15 days, before the end of the Copa America, otherwise Pastore stays with us. However, there's a 90 per cent chance that he'll go away, because it is the desire of the player. That is normal when you know that certain clubs want you," Zamparini told told Gr Parlamento.
"Pastore will go to England or Spain, but I'd exclude Barcelona, because they already have (Andres) Iniesta and Xavi in that position.
"The favorites are Real Madrid and Malaga. Manchester City are also interested in him, as well as Manchester United and Chelsea. I'm sorry to let him go, because he is the only world-beater that I have had (at the club) as president."
22-year-old Pastore would continue with the policy of bringing young talent to the club and building for the future, but would King Fergie really break the club transfer record for a 22- year old?
