Celtic vs St Mirren LIVE: Scottish Cup semi-final

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Celtic 1-0 St Mirren

Celtic are playing pretty well but they'd love a second goal. Kieran Tierney drives down the left-hand side but his cross lands on the roof of the net.

Killing games off has been a repeated problem for Celtic this season.

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Celtic 1-0 St Mirren

Eck: Derek Johnstone made his name as a 16 year-old in a Hampden final against Celtic 56 years ago - and look what happened to him!

Phil: This could be a cricket score…

Remember, you can have your say on this semi-final at the top of this page by clicking that icon on the left-hand side on desktop, or at the tob on the BBC Sport app.

GREAT SAVE!

Celtic 1-0 St Mirren

And this time it's a top save from Grant Tamosevicius!

Benjamin Nygren slips in Daizen Maeda and his fierce low shot is parried away by the St Mirren substitute.

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Celtic 1-0 St Mirren

Pat Bonner

Former Celtic goalkeeper on BBC Sportsound

As an ex-goalkeeper, I really hope that it goes really well for the young man and he survives this.

He could be the hero, who knows.

'He's just passed his driving test'

Celtic 1-0 St Mirren

Steven Thompson

Former St Mirren striker on BBC Sportsound

What a way to make your debut at a football club. God only knows what's going through his head right now.

I just pray and hope he does well. Come on, Granty boy.

I can't stop laughing. He's just passed his driving test.

Saints bring on 17-year-old keeper

Celtic 1-0 St Mirren

Well, Thommo, he's on. Struan will be cheering Grant Tamosevicius on along with the other Buddies fans.

Ryan Mullen trudges off and probably wishes the Hampden turf would open up and swallow him whole.

A costly error after 55 seconds, and now off injured on 14 minutes.

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Celtic 1-0 St Mirren

Steven Thompson

Former St Mirren striker on BBC Sportsound

On the bench is my son's teammate in the under-19 team, Grant Tamosevicius.

He's a great wee goalie and last night, my son was saying to me "imagine he has to come on!"

I said "I doubt it, Struan" but he'll take it in his stride, he's a great wee kid and he's been great for the under-19s.

Ouch!

Celtic 1-0 St Mirren

St Mirren goalkeeper Ryan Mullen is now down in his own box, getting treatment from the physios.

Seventeen-year-old Grant Tamosevicius is the only replacement available given Shamal George is injured.

He's warming up and looks set to make his pro debut here!

Celtic put in shift

Celtic 1-0 St Mirren

Benjamin Nygren beats St Mirren's pressure and Celtic work it to Yang Hyun-jun.

It's cut out by the Saints defence, but then goalkeeper Ryan Mullen is almost charged down again by Nygren as he clears.

Celtic are noticeably running a lot more than last week.

HITS THE WOODWORK

Celtic 1-0 St Mirren

Arne Engels curls a lovely shot from the edge of the box off a post!

It was a well-worked opportunity from the corner by Celtic, and they are unlucky not to be 2-0 up.

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Celtic 1-0 St Mirren

Alan Hutton

Former Rangers defender on Premier Sports

You've got to know your opposition, know Maeda will charge everything down.

Craig McLeish wants his team to play more with the football but you can't take risks like that early on. You must get rid. Too dangerous.

'Mullen should have put his foot through it'

Celtic 1-0 St Mirren

Pat Bonner

Former Celtic goalkeeper on BBC Sportsound

Incredible.

Ryan Mullen should have been aware there. He should have put his foot through it, but the touch allows Maeda to make up the ground.

He's got to try and shut it out now. It's part and parcel of being a professional.

GOAL - Celtic 1-0 St Mirren

Daizen Maeda

Oh my word. A nightmare for stand-in goalkeeper Ryan Mullen.

On just his second start of the season, he takes a loose touch from Miguel Freckleton's pass.

With Maeda around, you can't afford to do that. The Celtic striker slides in to block the clearance and it hits off him and slides into the net!

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