The outstretched leg of Shea McGuckin denies Monaghan's Bobby McCaul a goal.

It deflects over and Micheal Bannigan adds another moments later. Only four in it now with ten minutes to go.

Conor McCarthy gets Monaghan's fifth two-pointer of the second half to cut the gap to six.

Rory Beggan steps up and effortlessly nails another two-point free for Monaghan who trail by eight once again.

16 minutes to go.

John McGovern
BBC Sport NI at the Athletic Grounds

Just as Monaghan looked to be building momentum, with a couple of two-pointers and the breeze at their backs, Niall Loughlin delivers a huge blow with another Derry goal.

The Oak Leaf supporters rise as one at the Athletic Grounds

Following his goal in the first half Eoin McEvoy shot on the turn and split the posts for Derry after David Garland had responded for Monaghan.

Niall Loughlin palms to the net for Derry's third goal just as Monaghan were making their way back into the game.

Could that be curtains for the Farneymen with 20 minutes to go?

Image source, Inpho

There is another two-pointer! This time from Andrew Woods and all of a sudden there are only seven between the sides.

Michael McCarville got himself a point in the first half and he has stepped up 10 minutes into the second to raise an orange flag.

Just like that, Derry are down the other end and again Shane McGuigan finishes the move with a point. His fifth of the game.

John McGovern
BBC Sport NI at the Athletic Grounds

Monaghan began the half with renewed energy, tightening up defensively and limiting the Oak Leafers to few clear chances in the opening five minutes, while also registering the first point after the restart.

But that momentum has been checked, with Shane McGuigan hitting back-to-back scores to steady Derry once again.

A sublime pass from Stephen O'Hanlon to pick out Micheal Bannigan. He has a chane at goal but he fires wide!

First score of the half for Derry after 41 minutes and it's a classy one from Shane McGuigan.

Conor McCluskey intercepts the resulting kick out and McGuigan gets on the ball to point again for a quick-fire double.

Rory Beggan has a chance at a much-needed two-pointer for Monaghan and he gets it.

Could that spark the Farney into life?

Image source, Inpho

Back under way with Bobby McCaul introduced for Monaghan.

Marc O Se
Former Kerry defender speaking on GAA+

You look at the spread of the scores. They've all chipped in. They're dominating out around the middle. It's been all Derry. It's so hard to see what Monaghan are going to do to bring things back.

Live tomorrow from 15:45 on BBC Two and iPlayer, Sarah Mulkerrins presents full match coverage of our second semi-final, Armagh v Down from St. Tiernach's Park in Clones, with expert analysis from the panel.

Commentary is by Thomas Niblock and Conor McManus, with pitch-side updates from Orla Bannon.

Updates can also be followed live on the BBC Sport NI website

Image source, Inpho

John McGovern
BBC Sport NI at the Athletic Grounds

Gabriel Bannigan has plenty to address at the break if Monaghan are to turn this around.

Ciarán Meenagh, by contrast, will be pleased with his side’s clinical edge for goals despite a series of missed efforts from distance, with Conor Glass’s midfield dominance helping Derry control possession and drive their attacking threat.

Image source, Getty Images

David Mohan
BBC Sport NI at the Athletic Grounds

Derry manager Ciaran Meenagh won't turn his nose up at a 10-point lead at the break, but there's a feeling the Oak Leafers haven't made the most of their opportunities with five two-point efforts sailing wide and nine wides in total.

Monaghan will have the breeze for the second period - not a huge wind, but it may aid their long-range threat as they seek to narrow the gap.

Despite nine wides, Derry are well in control at the break in Armagh.

It's a huge mountain for Monaghan to climb in the second half.

Image source, Inpho

Shane McGuigan lines up a two-point free, but it floats wide just before the hooter.