Manchester United co-chairmen Avram and Joel Glazer are reportedly growing increasingly confident of remaining in control of the club by securing outside investment.
The Glazer family last week announced a third round of bidding for the club, with offers expected to land before the end of the month.
Finnish businessman Thomas Zilliacus refused to take part in any further bids following the move.
That left Sheikh Jassim bin Hamad al-Thani, of Qatar, and British billionaire Sir Jim Ratcliffe as the only publicly interested parties in a full takeover.