Even extra-time couldn't separate these two in Omagh's Healy Park last week as the two counties continued their great rivalry across all grades by producing another thriller.
owever, Donegal underlined just how good they are in Ballybofey when inflicting a first defeat of the league campaign on the Red Hands last weekend and the change of venue for this game should stand to their U-21s here, who had the likes of Eoin Ban Gallagher in excellent form in the drawn match.
Fergal Logan's Tyrone might have won the game in normal time only for a last-gasp save from Ethan O'Donnell but they refused to give up and Lee Breenan's nerveless '45 late in extra-time ensured they'd get another bite at the cherry tonight.
However, it won't be lost on Logan or his selectors, Peter Canavan and Brian Dooher, that half of Donegal's total of 0-14 in the drawn match came from placed balls.
Both sides go into the game knowing they can progress, but Donegal's tally of 14 wides the last day means they might have the biggest room for improvement in what is likely to be another enthralling encounter.
Odds: Donegal 4/6 Tyrone 6/4 Draw 13/2