Man of the match Shane O'Donnell speaking to GAA+: "I think we got a big wake-up call in the first half, Monaghan came out all guns blazing but thankfully we were able to turn it around second half, we got an early free and that got us started from there. It took us a while to get going."

On the half-time team talk: "Jim (McGuinness) was brutally honest, he gave us a few harsh words which we needed, and it looked like it helped us in the second half. Everything he said we took on board and into the second half and the boys coming off the bench were a massive help."

On reaching the last four: "We're back to where we were last year, we are going to put the head down for two weeks and get the bodies right. We had a tough few weeks there so we are happy to have a few weeks off to focus on our next opponent whoever it is."

What a comeback from Donegal, who march onto the last four and not many teams will want to come up against them when they can produce that sort of second half display.

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Donegal have done it and they are back in the All-Ireland semi-final.

Jim McGuinness' side were rampant in that second half after trailing by seven at half-time.

They outscored Monaghan 1-15 to 0-5 in that second half so whatever Jim McGuinness said at half-time obviously worked.

That also included a period of 11 Donegal scores without a reply.

Image source, Inpho

David Garland lands a two-pointer for Monaghan and that's their first score in over 24 minutes.

Eleven unanswered scores for Donegal who have been emphatic in this second half.

Michael Langan lands from two point range.

Arguably the biggest roar of the day is reserved for Michael Murphy as he is replaced by Niall O'Donnell.

The big Glenswilly man kicked four points and was inspirational all over the field.

Jack McCarron has a go from two point range off the outside of his left.

It's Monaghan's 11th wide and they're now over 20 minutes without a score.

Andrew Woods tries to palm an effort towards goal but it is easily gathered by Shaun Patton.

Micheal Bannigan has a go for Monaghan from two point range but it's well wide and that's their 10th wide.

Less than five to go and Donegal lead by six.

Monaghan kick their ninth wide and they have completely capitulated.

This has been a sensational second stanza for Donegal.

Captain Patrick McBrearty makes it nine points without a reply with his second score.

Michael Murphy trots out to take the kick and sends it to the right and wide.

Donegal's fourth wide.

David Garland is back on the field wearing number 30.

Conor O'Donnell has been superb for Donegal as the rain starts to fall here in Croke Park.

O'Donnell is fouled but Patrick McBrearty opts to recycle possession and it ends with Ciaran Thompson winning a 45'.

David Garland is replaced by Stephen Mooney but that's a temporary blood sub.

Kieran Duffy is shown a yellow card for Monaghan.

Darren Hughes and Karl O'Connell come on for Monaghan as Gary Mohan and Conor McCarthy make way.

An 11-point swing has Donegal ahead and they're really in their groove now.

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Donegal force another Monaghan turnover and go on the counter attack.

Eight scores in a row for Donegal now as Conor O'Donnell adds his 4th point.

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Seven unanswered Donegal points now as Patrick McBrearty the captain shoots over.

Gary Mohan kicks Monaghan's eighth wide.

They've kicked just three points in 21 second half minutes.

Peadar Mogan plays a one-two with Patrick McBrearty before fisting over.

Six Donegal scores in a row now.

Eoin McHugh replaces Ryan McHugh on the Donegal team.

Monaghan leave another effort short and Donegal have kicked the last five scores.