Aberdeen striker Bojan Miovski is screaming for a penalty as he is challenged by Liam Scales.

It does appear to brush the central defender's fist inside the penalty box.

VAR is checking...

Leighton Clarkson's poor free-kick deceives everyone apart from Stefan Gartenmann.

The Dons centre-half is free at the back post, but Joe Hart makes himself big and blocks the shot. Excellent stop from the veteran former England goalkeeper.

That goal has settled Celtic and they again threaten.

Alistair Johnston this time eyes the goal and the right-back sends a stinging low drive a yard or so wide of the far post.

Returning Celtic captain Callum McGregor has struggled to be as influential as usual.

However, the Scotland midfielder finds some space 18 yards out and lashes a drive a yard over the crossbar.

Kheredine Idessane
BBC Scotland at Hampden

The Dons have coped well with the disappointment of that needlessly conceded equaliser.

There's still something amiss with Celtic's balance.

Yang is offering little down the left, while the normally productive midfield of McGregor, O'Riley and Hatate hasn't been allowed to impact the game much thus far.

Aberdeen's shape, energy and aggression have a lot to do with that.

Image source, SNS

No surprise that celebrity Celtic fan and rock singer Rod Stewart and son are at Hampden.

James McFadden
Former Scotland forward on BBC One Scotland

I think the instruction would be to be brave on the ball and don't force it. But there's a time and a place and, being the last man, turning your back and not being able to play that pass to your goalkeeper.

It is a gift, but you have to be able to take that opportunity as well.

When you're 1-0 up in a game of this size, playing as well as you are, you cannot be giving away opportunities like that.

Willie Miller
Former Aberdeen captain on BBC Sportsound

Aberdeen were looking confident, perhaps over confident from Angus MacDonald, who has been excellent since coming back into the team.

But you cannot give Kyogo that opportunity.

What a blow!

Pat Bonner
Former Celtic goalkeeper on BBC Sportsound

You just can't do that, can you? Give Celtic those opportunities.

The ball is stuck under Angus MacDonald's feet. He's rolled it under his foot - get it to the goalkeeper, get rid of it!

Pat Bonner
Former Celtic goalkeeper on BBC Sportsound

Celtic are looking rattled. They haven't been allowed to settle in the game.

Celtic will get chances, but the way Aberdeen have gone about it so far is excellent. They're very intimidating and haven't allowed Celtic to control the game.

Some might have raised an eyebrow at Bojan Miovski being named in the PFA Scotland team of the year this morning ahead of Celtic counterpart Kyogo Furuhashi.

The Macedonia international Miovski has been struggling to find the net in recent weeks - especially away from Pittodrie.

But that's his 24th goal of the season - and he seems to rise to the big occasion.

Kyogo's 17 goals are fewer than expected after his fine season last term, with the suggestion Brendan Rodgers' system is less suited to his style than last term under Ange Postecoglou. But the Japan striker has looked back to his best recently - can he bring Celtic back into the game?

Image source, SNS

Ouch!published at 12:48 British Summer Time 20 April

12:48 BST 20 April

Aberdeen 1-0 Celtic

Nicolas Kuhn is heading to the touchline with his nose pouring with the blood.

The Celtic winger coming off worse in a clash of heads with Aberdeen defender Jack MacKenzie.

Pat Bonner
Former Celtic goalkeeper on BBC Sportsound

Kyogo controlled that beautifully, but if Kelle Roos was beat by that, I think he'd be very disappointed.

Another sight at goal for Celtic.

Kyogo Furuhashi gathers brilliantly from a long ball into the Aberdeen penalty box and fires a shot from an acute angle that goalkeeper Kelle Roos manages to deal with.

Kheredine Idessane
BBC Scotland at Hampden Park

Could the Aberdeen fans make themselves heard? You better believe it.

Bojan Miovski's been the main man for them this season, but that's just his second goal in his last dozen games.

It's given the red end of Hampden exactly the start they wanted, though the Celtic fans are still full of song. They think the Dons have scored too soon.

Chance for Celtic to strike back immediately.

Goalkeeper Kelle Roos can only get a finger tip to Nicolas Kuhn's chip into the six-yard box and fellow winger Yang Hyun-jun heads over at the back post.

Willie Miller
Former Aberdeen captain on BBC Sportsound

He's the key man for Aberdeen and he's found his form at the right moment early in this semi-final.

His run is fabulous, the pass is superb, the finish is calm and cool and Miovski all day long.

What a start!