Dublin take on Monaghan in Clones this afternoon with at least one of the sides set for relegation to Allianz Football League Division 2 next season.
The loser is certain to go down to the second tier, while the winner will need favourable results in the other three games to stay up.
One of Tyrone, who face table-toppers Kerry, Kildare or Donegal must slip up in their final fixture to keep the winner of the tie up.
