While a summer exit could be on the cards, Cesar's representative has ruled out a return to his native Brazil.
"Everything said on the player's future is absolutely premature, there is still nothing concrete," Cardoso told Calciomercato.
"Julio wants a team that proves it has a focus on him, but anyone interested in him will have to talk first with QPR, because the contract with the London club expires in 2016.
"In two weeks I should come to Europe to talk with Julio, but back to Brazil? I don't think so. If QPR were to decide to sell Julio Cesar, I still see a European future for him."
Cesar moved to Loftus Road from Inter Milan last summer.