The Rangers fans are furious as Stevie May catches Connor Goldson with a late tackle in the home box.

Goldson took a heavy touch with May bearing down on him, the Aberdeen striker lunged to try and block the clearance, but his trailing leg connects with Goldson.

May's name is the third taken by referee Kevin Clancy.

This time, Morelos gets the decision from Clancy as he hares towards the Aberdeen box and goes down under Scott McKenna's tackle.

McKenna is booked but Borna Barisic's free-kick is held by Lewis at the second attempt.

Moments later, former Aberdeen captain Ryan Jack collects a ricocheted corner deep in the Dons box, but his low right-foot shot strikes the base of the post and bounces clear.

That's as close as Rangers have come to levelling.

Hearts have a penalty! Jake Mulraney is brought down by Conor Hazard. Huge chance for the hosts to go ahead.

Just as he was in the Pittodrie match, Alfredo Morelos has been booked for diving in the Aberdeen box.

The Colombian spun away from Andy Considine and hit the deck - the Rangers fans howl for a penalty but their striker is shown yellow for simulation. The replays suggest that was a harsh call from Kevin Clancy, with Considine's arm around the shoulder and neck of Morelos.

That yellow card means Morelos will miss the semi-final if Rangers get there.

Oh, what a chance for Rangers and it's Daniel Candeias - of all people - who fluffs his lines.

Scott Arfield robs the ball from Aberdeen around halfway and slides Candeias clear up the right.

He's got two men in the middle but his cross is hopeless and flies out for a goal kick.

A huge missed opportunity.

It's been all Rangers since the McGinn goal. They've had all the possession, much of it around the Aberdeen box, but Gerrard's men haven't carved out a clear-cut chance or worked Joe Lewis in the away goal.

There's some frustration in the home ranks too, as Daniel Candeias picks up a yellow card for dissent.

A good set-piece opportunity for Rangers as Considine brings down Morelos near the left angle of the box.

James Tavernier whips it in right-footed but it's far too close to Joe Lewis - easy pickings for the big goalkeeper; disappointing for the hosts.

Aberdeen can't get out. Rangers are pummelling them, an array of deliveries, shots and headers peppering the away box.

The Dons are trying to play out when they do win the ball, but keep giving it away deep in their own half.

The Ibrox crowd are growing frustrated as Rangers fail to turn their immense pressure into an equaliser.

Here's a look at Niall McGinn's cool finish to score the goal that currently separates the teams after just three minutes.

He pounced on a poor Glen Kamara pass to canter into the box and fire low beyond Allan McGregor.

Image source, SNS

A sweet, sweet moment for the Aberdeen manager as Niall McGinn's opener hit the back of the Rangers net...

Image source, SNS

The atmosphere at Ibrox is ratcheted up as Rangers hem Aberdeen deep in their own half.

Morelos gets a sniff six yards out but has the ball nicked off his toes by Andy Considine as he cocks his leg to shoot.

The Colombian embarks on a barreling run up the left but his square ball is blocked.

Better from Steven Gerrard's hosts.

Partick are starting to get a foothold in the game in Gorgie. A well-worked move ends with a delivery from the right flank for Scott McDonald who gets a header away but it doesn't trouble Bobby Zlamal in the Hearts goal.

Neil McCann
Former Rangers winger on BBC Sportsound

Willie Miller
Former Scotland defender on BBC Radio Scotland

Rangers go on a forward foray and Alfredo Morelos gets his first chance to rumble downfield.

The striker slides a through-ball between Dom Ball and Scott McKenna for Ryan Kent to speed after, but he's brilliant eased aside by Ball.

Moments later, Rangers break up the right with Daniel Candeias, his cross eventually finds Scott Arfield, whose blasted effort is well blocked and Aberdeen win a foul.

It looks like a cracking intervention from young Dean Campbell on his first Dons start.