Neil McCann
Former Rangers winger on BBC Sportsound

Oscar Cortes looks like he's going to have an eye for goal.

He's not one to take the easy option.

It's nice feet and another nice strike from Oscar Cortes, but it's straight down the throat of the keeper.

Rangers are piling the pressure on their lower-league visitors, but Ayr have got through the first six minutes without conceding.

An incredible comeback from struggling Livi sends them through to the last eight.

What a morale boost that will be.

Ooft, so unlucky for Oscar Cortes on his first start.

He curls one low to the far corner but sees the striker clip the right-hand post.

Away we go at Ibrox.

Image source, SNS

Rory Loy
Former Dundee striker on Sportsound

Joel Nouble has been a cut above in this game.

Partick Thistle have died on their feet since the second goal.

This is anyone's game. I can't see this one not going to penalties.

Tete Yengi almost wins it!

He bursts into the box and shapes to shoot, powering at goal - but Jamie Sneddon turns behind.

A huge save.

Image source, SNS

Ayr United head coach Scott Brown tells BBC Scotland: "It's where the lads want to be, they've got ambitions.

"It'll be a tough test but an enjoyable one, there's no pressure on the lads.

"We know Rangers will have a lot of the ball. It's about making sure we're secure but we also need to be brave on the ball."

Image source, SNS

Rangers manager Philippe Clement tells BBC Scotland: "We cannot expect miracles [from Mohamed Diomande and Oscar Cortes].

"They need to get used to the way of playing, when to do what. You need games and training for that. Today is the day to take the first step.

"If you want to be competitive in four competitions, you need to rotate. We give chances along the way if they deserve that. That's my philosophy."

Livingston create another chance as Tete Yengi chests back to Stephen Kelly, but his half-volley is smothered by Jamie Sneddon.

That's us now at the end of the first half of extra time.

Martin Dowden
BBC Sport Scotland at Ibrox

The panto villain is already in place. Scott Brown has already been perched at the end of his technical area awaiting for a, most likely, less than warm welcome to say the least.

He's been keen to deflect from himself in the build up and focus on the opportunity this presents for his side and his club in general. It's a big one but also a big test.

Philippe Clement has, as seems the norm, rung the changes but has indicated the potential for an upset. Expect no complacency with several players likely to be keen to impress.

Joel Nouble is causing more bother on the right and he swings in a cross that almost goes over the head of Jamie Sneddon.

The ball comes back to Tete Yengi and he fires at goal, but Sneddon holds at the second time of asking.

Amid seven changes for the hosts, Rangers boss Phillippe Clement gives first starts to recent arrivals Mohamed Diomande and Oscar Cortes.

Borna Barisic starts at left-back in place of Ridvan Yilmaz, while a trio of further changes take place in midfield - with Ryan Jack, Nicolas Raskin and Scott Wright all starting.

The final change occurs in attack, with Fabio Silva replacing Cyriel Dessers at centre-forward.

The visitors make one switch from last weekend's defeat to Dundee United, with Logan Chalmers replacing Fraser Bryden on the wing.

Image source, SNS

Rangers: Butland, Tavernier, Souttar, Goldson, Barisic, Jack, Raskin, Diomande, Cortes, Wright, Silva.

Substitutes: McCrorie, Yilmaz, Lundstram, Dessers, Cantwell, Matondo, Davies, King, McCausland.

Ayr Utd: Mutch, McAllister, McGinty, Stanger, Reading, Dempsey, Syla, Chalmers, McKenzie, Murphy, Dowds.

Substitutes: Albinson, Sanders, McGeady, Tomlinson, Musonda, Willoughby, McHugh, Bryden, Guthrie.

We'll provide reaction as we get it.

In the meantime, let's turn our attention to Ibrox...