It's been suggested United will insist Pogba won't be allowed to leave past the August 8 closure of their window.
However, Pogba's entourage are adamant the saga can run to the end of next month.
The confidant told AS: "It is both possible and impossible that Pogba finishes at Real Madrid.
"We must remain calm, we are working on it. Everything could continue until the end of August, why not? Anyway, a transfer to Real Madrid does not depend on Paul."