For the second time in three years, Kerry must avoid defeat in Omagh on the final league Sunday to escape relegation.
However, on this occasion Tyrone are also in trouble ahead of next Sunday's meeting of the sides.
And there's an added complication too: a Kerry victory may seal them a semi-final spot.
After six rounds, Cork are the only team guaranteed a semi-final berth, while Derry's relegation was confirmed by their loss to Dublin on Saturday.
Any one from Tyrone - who are on four points - and the trio of Kerry, Mayo and Donegal on six points could find themselves joining Derry in Division 2 next year.
Tyrone, who have won just three times in their last 11 league and championship games in Healy Park, will need to beat Kerry by two points to send the Kingdom down. A draw for Kerry would be enough to avoid relegation but unlikely to earn them a last four position.
Monaghan (eight points) and Dublin (seven) are both safe from relegation, and a home draw for Monaghan next Sunday would likely be good enough to confirm their place in Sunday week's semi-finals.
Mayo welcome Donegal to Castlebar on the final day, with both sides knowing a draw will secure their Division 1 status for 2016.
In Division 2, Down's defeat to Meath in Newry on Saturday means they will need a victory at home to Laois next weekend to be guaranteed a Division 1 spot next season.
Mathematically, Laois are still in the hunt for promotion along with Meath, Cavan, Roscommon and Galway. However, Laois and Galway could yet be overhauled by Kildare and Westmeath, who are currently in the relegation positions.
In Division 3, Armagh and Fermanagh confirmed their ascension over the weekend while two will be relegated from Wexford, Limerick, Louth and Clare. Longford's victory over Offaly means they will play in Division 3 next season.
They will be joined by the winners of Offaly and Antrim in Tullamore next Sunday. A draw will suffice for the Faithful County as they have a better scoring difference.
Should three or more teams finish on the same points total, score difference will be used to determine the finishing positions. However, should two counties end up on the same points total, the result of their head-to-head clash will be the deciding factor.
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