The Glazers are in a standoff with the prospective bidders for Manchester United, having already pushed back their deadline to complete a sale of the club.
The Americans are seeking either a full takeover or partial investment in the Red Devils as their reign as owners enters its 18th year. They have become deeply unpopular among supporters, with United last winning the Premier League title a decade ago.
Two groups have so far gone public with their bids for a full takeover. The first is led by Sir Jim Ratcliffe of chemical giant Ineos, while the other is fronted by Qatari banker Shiekh Jassim bin Hamad Al Thani.