Matt Gault
BBC Sport NI at Celtic Park

It's a testament to how hard Donegal have worked that Brendan Rogers, Conor Glass and Shane McGuigan have been so quiet.

Caolan McGonagle will be kicking himself that he didn't fire home that goal chance for Donegal.

Still, though, Jim McGuinness will be the happier manager right now.

There is much to ponder for both Mickey Harte and Jim McGuinness after a pulsating 35 minutes of action, with Ciaran Moore and Brendan Rogers notching the last scores of the half.

It has been an excellent game so far. Few expected Donegal to win coming into this game, but it is they who deservedly lead at the break.

However, with just one point splitting them, Derry will remain confident that they can wrestle back control.

Shane McGuigan has his first of the day - from a close range free.

Ethan Doherty pulls Derry back to within two.

Peader Mogan pushes Donegal three ahead.

The underdogs have been magnificent in this first half. Can they see their lead through to half-time?

Daire O Baoill delivers a fine finish to score the opening goal for Donegal.

Chrissy McKaigue possibly could have had a go at goal, but instead elects to take the fisted point.

Mickey Harte is wasting no time in making changes, as Gareth McKinless comes in for Padraig McGrogan.

Change for Derry: Niall Loughlin is replaced by Niall Toner.

Oisin Gallen responds for Donegal, but Derry quickly work the ball down the other end and Paul Cassidy splits the posts.

Philly McMahon
Eight-time All-Ireland winner with Dublin on BBC Sport

That's a huge goal - Donegal have got the momentum now and Derry are struggling to break them down.

After a 1-3 scoring run for Donegal, Ethan Doherty has scored for the home side. Will that settle them down?

Matt Gault
BBC Sport NI at Celtic Park

That goal came from one of those booming Shaun Patton kick-outs which can really be a weapon for Donegal.

Wonderful finish from Daire O Baoill. Perfectly executed lob over Odhran Lynch. The Derry keeper was left scrambling.

Donegal are growing in confidence now, and they're ahead following another point from Ryan McHugh.

Daire O Baoil levels the game for Donegal.

They turn Derry over and looked as though they were going to be in for a goal chance. However, Derry get their defenders back and force the visitors into settling for a point.

Donegal are growing into this game, and Ryan McHugh has his first of the day, pointing following a surging run at the Derry defence.

Derry have an immediate response, as Conor Doherty bombs one over from distance.

Caolan McGonagle misses a huge goal chance for Donegal!

Driving through one on one he looked certain to find the net, but his shot is turned behind by Eoin McEvoy, who came from nowhere to get the block.

However, Oisin Gallen has scored from the '45 to get Donegal up and running.

Matt Gault
BBC Sport NI at Celtic Park

What nerves?

Even by Derry's standards, that was a remarkably composed sequence of possession leading up to Paul Cassidy's mark.

Serious unit.

Philly McMahon
Eight-time All-Ireland winner with Dublin on BBC Sport

If you look at Derry they are very, very high. If Donegal get a turnover let's see how they counter.