Postpublished at 15:25 British Summer Time 28 April
Donegal 0-13 Tyrone 0-14
Three to go and Tyrone still hold that slender advantage!
Donegal are pressing though...
Summary
Donegal v Tyrone - 14:00 BST
Donegal last won the Ulster final in 2019.
Tyrone last lifted the Anglo-Celt in 2017.
The winner will face Armagh in the Ulster final on Sunday 12 May.
Postpublished at 15:25 British Summer Time 28 April
Flying high!published at 15:23 British Summer Time 28 April
Donegal 0-13 Tyrone 0-14
Image source, Getty ImagesImage caption, Donegal's Jason McGee and Brian Kennedy battle for the high ball
Postpublished at 15:22 British Summer Time 28 April
Donegal 0-13 Tyrone 0-14
Darragh Canavan lands a free and Tyrone edge in front once again.
Level!published at 15:21 British Summer Time 28 April
Donegal 0-13 Tyrone 0-13
Ciaran Thompson with a chance to level it......and he absolutely nails it!
Six to go and we're level once again!
Postpublished at 15:20 British Summer Time 28 April
Donegal 0-12 Tyrone 0-13
Orla Bannon
BBC Sport NI at Celtic ParkEvery time Tyrone have nudged in front in this half, Donegal have responded and drawn level twice. It is so tight.
Donegal haven't led since the fifth minute and there's a sense that if they can get their noses in front, it could be massive going into the final 10 minutes. So far Tyrone are hanging on.
Postpublished at 15:19 British Summer Time 28 April
Donegal 0-12 Tyrone 0-13
Don't forget, Tyrone had to go through an exhausting extra-time period in their quarter-final win.
Will that show in the closing stages?
Tyrone 'letting Donegal back in it'published at 15:19 British Summer Time 28 April
Donegal 0-12 Tyrone 0-13
Tyrone are not making their lives easier for themselves as every time they get a two or three point lead they're letting Donegal back in it.
The longer this goes on the more it's in Donegal's hands.
Tyrone lead!published at 15:18 British Summer Time 28 April
Donegal 0-12 Tyrone 0-13
Michael McKernan sends one over from range and the scales tip in Tyrone's favour once more.
Ten minutes to play and this is anyone's game!
Level!published at 15:13 British Summer Time 28 April
Donegal 0-12 Tyrone 0-12
Donegal win a free in just outside the square, and Oisin Gallen does the rest.
Level once again with 15 minutes to play.
Postpublished at 15:09 British Summer Time 28 April
Donegal 0-11 Tyrone 0-12
Now the momentum is with Jim McGuinness' side! Caolan McGonagle with a fine effort!
Postpublished at 15:09 British Summer Time 28 April
Donegal 0-10 Tyrone 0-12
Peadar Mogan pulls off a big score to bring it back to two. We don't know where to look, the scores are flying over.
Postpublished at 15:08 British Summer Time 28 April
Donegal 0-9 Tyrone 0-12
In the blink of an eye it's three!
Darragh Canavan puts a goal between the sides!
Postpublished at 15:07 British Summer Time 28 April
Donegal 0-9 Tyrone 0-11
Ciaran Daly punishes a poor kick out and Tyrone's lead is up to two!
'One of those games that needs a goal'published at 15:07 British Summer Time 28 April
Donegal 0-9 Tyrone 0-10
Philly McMahon
Eight-time All-Ireland winner with Dublin on BBC SportIt's one of those games that needs a goal to spark something but we're not really getting goal chances. All we have to hope for is that there's momentum building at both ends.
Postpublished at 15:07 British Summer Time 28 April
Donegal 0-9 Tyrone 0-10
Tyrone win a free and Niall Morgan strolls up to take it...and he lands it!
That's the Red Hands into double figures and three of those are from the keeper.
Level!published at 15:05 British Summer Time 28 April
Donegal 0-9 Tyrone 0-9
Daire O Baoill does what he does best and we're level for the fifth time this afternoon!
That's his last contribution and Jamie Brennan is on in his place.
Postpublished at 15:01 British Summer Time 28 April
Donegal 0-8 Tyrone 0-9
Back to one! Niall O'Donnell fires it over after a nice shimmy in the middle.
High five!published at 15:00 British Summer Time 28 April
Donegal 0-7 Tyrone 0-9
Image source, Getty ImagesImage caption, Tyrone keeper Niall Morgan is congratulated by Kieran McGeary after scoring a point
Postpublished at 15:00 British Summer Time 28 April
Donegal 0-7 Tyrone 0-9
And just like that, the lead is back up to two.
Niall Morgan is up from his goal to curl it between the posts.
Postpublished at 14:59 British Summer Time 28 April
Donegal 0-7 Tyrone 0-8
Conal Devlin is down receiving treatment but play continues and Donegal have a man advantage.
Oisin Gallen looks to pull them level but it's narrowly wide and Tyrone survive!