Ineos proprietor Sir Jim Ratcliffe and Qatari banker Sheikh Jassim volition taxable improved bids to bargain Manchester United earlier Wednesday's 21:00 GMT deadline.
The 2 parties, the lone publicly-declared bidders, met with United officials this month.
Both are understood to person held affirmative meetings portion visiting Old Trafford and United's grooming ground.
Ineos privation to bargain the combined Glazer shareholding of astir 69%, but the Qataris are targeting 100% of the club.
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BBC Sport has learned that United officials met 8 antithetic imaginable investors implicit a 10-day play of high-level meetings recently, including Ratcliffe and representatives of Sheikh Jassim.
The magnitude of their archetypal bids person not been disclosed (with reports some are successful the portion of £4.5bn), but they are intelligibly acold beneath the £5-6bn valuation that the club's American owners - the Glazers - person established.
Whether they - oregon immoderate different prospective bidders - are capable to taxable an connection that persuades the Glazers to merchantability is the adjacent cardinal question.
If not, and with United's fortunes improving importantly successful caller months nether manager Erik 10 Hag, the Americans whitethorn good yet determine to clasp the nine and possibly alternatively look to merchantability a number involvement to the likes of US hedge money Elliott Investment Management.
The Glazer household said successful November they were considering selling United.
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