Olympique Marseille want an answer from Inter Milan midfielder Amantino Mancini.
The Brazilian has seen Inter agree to send him to Marseille on-loan, but is yet to give the move his personal approval.
"We await your response," Marseille chief Antoine Veyrat said. "The contract we have proposed is clean and clear and with the club we have formalized it.
"If he says yes, everything can close quickly. Of course our patience has limits, and to wait beyond Sunday does not seem very reasonable."