Five minutes left of the first half.

It's flew in.

Ryan McGowan
Former Hearts defender on BBC Scotland

If it gets to 0-0 at half-time, Morton could regroup and come out a little more refreshed in the second half.

You never know, a mistake, a couple of loose headers here and there and they get an opportunity and take it, it could totally change the game.

There's been a real swing in momentum in the last five minutes or so.

Nothing has really sparked it, Hearts just seem to have cracked out their shell.

Certainly in the ascendancy now.

Ryan McGowan
Former Hearts defender on BBC Scotland

I think that is where Morton are missing Oakley - he is someone who can hold the ball up, bring Morton out up the pitch, maybe win a foul, keep possession.

He is a big miss for them and they seem to be struggling without him...

Lawrence Shankland swivels in search of the bottom corner but Ryan Mullen just gets enough to push it onto the post and out for a corner.

Hearts are growing into this...

Image source, SNS

Alan Forrest if making some lovely runs down the channels.

Really appears to be targeting the right-side of Morton's defence where the booked Jack Baird is.

Image source, SNS

Brian McLauchlin
BBC Scotland at Cappielow

The home side have certainly played the first quarter of this match with an energy and a belief.

The game plan to go back to front quickly is working and placing the Hearts defence under significant pressure.

Image source, SNS

Jack Baird enters David Dickinson's book.

I'm not too sure what he's to do, there. Going for the ball, he does just connect with Beni Baningime, but aye, not sure where he's meant to put his foot there.

Morton centre-back must be careful now.

Hearts just cranking up the pressure a wee bit...

Dexter Lembikisa has a decent delivery on him. A couple more balls make their way into the box before Lawrence Shankland has a pop on the half-volley from the edge of the box.

A rarity, it just creeps over from the Scotland international.

Since experiencing Morton's win against Motherwell, I haven't stopped singing, 'Cowshed want to party all the time'.

It's so catchy and such a toe-tapper.

Shame I'm an awful singer. Spare a thought for my friends and family who have to listen to my cover version all the time.

Image source, SNS

Everyone wants a ticket to the hottest gig in town.

Got a funny feeling he won't have had to pull too many strings to get in tonight...

Image source, SNS

TV cameras have just shown the maaad queues still outside of Cappielow.

Get iPlayer up on the phone, troops...

Brian McLauchlin
BBC Scotland at Cappielow

Dougie Imrie looks really pleased with the start Morton have made.

Just a few feet away, Steven Naismith is asking for a bit more from his players...

Straight into the arms of Ryan Mullen from Jorge Grant.

Basically a pass-back, that.

Jack Baird goes right through the back of Jorge Grant.

First chance for Hearts to get the ball in the box from this free-kick...

Craig Gordon makes a save.

Chat of him making the Euros begins.

Like clockwork...

Oft! What a start that would have been.

Alan Power swings in a sensational free-kick, but Craig Gordon is alert and big as the goalkeper sprawls his frame out to get in before any Morton attacker can connect.

Ryan McGowan
Former Hearts defender on BBC Scotland

It's been a good start from Morton.

They want to get the ball in to the box, win the second balls.

Hearts have just seemed a little bit off.

A right bright start from Morton, they've come flying out the traps.

Piling pressure on the Hearts backline.

The last Scottish Cup quarter-final tie is a goer.

Cammy Devlin kicks us off.