The networks were last night close to formalising their response, with Ten waiting on final approval of finances from its Canadian-based parent company.
It should conclude the bidding for the 2007-2011 rights, but an outcome may not be known immediately reports Australia's Herald Sun.
The league (AFL) has indicated it will need time to weigh up all the factors, not just finances, of any counter against the conditionally accepted Channel 9 offer.
Nine has pledged A$780million over the five years and coverage in the black spots of New South Wales and Queensland via its pay-TV partner Foxtel.
The difference between the conditionally accepted Nine offer and that made by Seven-Ten at the first bid stage was said to be between A$75million and A$100million.
