It's the tie of the Super 8s this weekend - a Ballybofey shootout for a place in the All-Ireland SFC semi-finals between dogged, battle-hardened Ulster rivals.
Tyrone travel to Donegal knowing a win or a draw will send them into the last four, while their hosts must come away with two points.
The two counties have a win and a defeat to their name in Group 2 - they both fell short against the unbeaten Dubs - with the Red Hand's better scoring difference giving them what could prove a crucial advantage.
It sets up a mouthwatering showdown on Sunday afternoon, and while Donegal boss Declan Bonner expects a no-holds-barred contest, he doesn't anticipate a classic.
"There's been great battles down the years between Donegal and Tyrone. I'm sure this will be no different," he told RTÉ Sport's Marty Morrissey.
"It's probably going to be very tactical, it's going to be fairly physical I would say, it's going to be an interesting match, that's for sure. Is it going to be a classic? I don't know. It's one of these matches where there's a lot at stake."
On Wednesday former Tyrone talisman Sean Cavanagh said: "If the game was anywhere outside of Ballybofey, I would say Tyrone would win by three or four points, but it is such a tough place to go.
"It is a parochial ground and the crowd is right in on top of you. Home advantage will play a part, and rightly so."
Bonner will hope the natives can give his men the lift they require to squeeze every ounce of ability from themselves for what will be a tense occasion. With so much on the line, every little helps.
"The lads like playing in Ballybofey," he added.
"We're well used to it, but we need to get our performance levels right. If we get our performance levels right we've a chance of winning.
"Tyrone and Donegal have been up there with Monaghan as the top three teams in Ulster over the last decade. It's a huge opportunity for the winning team to move on to the last four."