Here we go then. The first of the Japanese trio, Mone Chiba, is on the ice.

Emma Smith
BBC Sport at Milano Ice Skating Arena

If Amber Glenn wins a medal from 13th place after short program, that is an all-time great Olympic comeback.

She still leads, with four skaters to go.

This is a long wait for Petrosian's score.

And it's tight. She gets a seasons best score of 141.64, but you wouldn't know it looking at her face.

Disappointed doesn't cut it. She's in second.

Jackie Lockhart
Four-time Olympic curler on BBC Two

Image source, Getty Images

Switzerland let us in [to the semi-finals] and now they are regretting that.

The GB boys raised their game and it was a game of two halves. When it came to the latter half, we were there and ready for it.

Switzerland won nine out of nine in the round robin. GB won five of their nine. They needed a Switzerland win this morning to ensure they made it through to the semi-finals.

But GB have won the one that mattered.

And there's one more than will really matter - the gold medal final on Saturday evening.

Gladiators and Michael McIntyre might have to take a back seat for a couple of hours because we'll all be a bit busy.

The harsh part is that she nailed that quad axel in the warm-up but just couldn't replicate it in her routine.

Emma Smith
BBC Sport at Milano Ice Skating Arena

If Adeliia Petrosian had nailed that routine, the race for gold would have been over. The complexity of some of those elements were phenomenal.

As it is, we must wait.

Richard Winton
BBC Sport Scotland in Cortina

Image source, Getty Images

This British quartet have guaranteed Team GB's fourth medal of these Olympics and they now have a chance to at least match the silver medal they won four years ago in Beijing.

Bruce Mouat, Grant Hardie, Hammy McMillan and Bobby Lammie came here top of the world rankings and targeting nothing other than gold.

And, for all they struggled in the round robin and only earned their place in the medal matches thanks to Italy losing on Thursday morning, they now stand one step away from achieving that ambition.

Steve Cram
Curling commentator on BBC Two

Great Britain go to the gold medal match and they turned it around.

Switzerland were on top up to the halfway point. That was tough, tough, tough.

The score makes it look easy, but it was tough.

Emma Smith
BBC Sport at Milano Ice Skating Arena

Petrosian attempts a quad axel - but falls!

GB HAVE DONE IT!

A medal is guaranteed for the British quartet!

Benoit Schwarz-van Berkel's attempt to clip a yellow into the house and disturb some reds goes awry and Great Britain are into the final!

Keep your Saturday night free - Bruce and the boys will be going for gold.

It will be hard for Adeliia Petrosian to medal now as she has taken a fall early on in her routine.

Steve Cram
Curling commentator on BBC Two

Switzerland have a lot of red to move here.

Richard Winton
BBC Sport Scotland in Cortina

Granny McMillan is knitting her way through the nerves in the bleachers...

Logan Gray
BBC Sport commentator and former elite curler on BBC Two

A great shot from Bruce Mouat.

Bruce Mouat's final stone...

Plenty of ice out wide - too wide? No, it's in for two shots for GB.

A tough shot left for the Swiss to get at least one to take us to an extra end.

Hands on faces in the crowd. So nervous.

Emma Smith
BBC Sport at Milano Ice Skating Arena

There will be many in figure skating who don't think Adeliia Petrosian - or her entourage - should be at these Games.

But the AIN skater has plenty of support in the crowd, with plenty of banners and signs. No Russian flags, of course.

And now she skates, potentially, for an Olympic medal.

Gubanova breathes a huge sigh of relief at the conclusion of her routine.

Yes, she had that small mistake coming out of the first triple lutz, but that didn't affect the rest of her routine.

She' given a score of 138.22 to put her in fourth. She will have wanted a higher score than that.

Logan Gray
BBC Sport commentator and former elite curler on BBC Two

The Swiss are torn between going for the win now or making sure they get an extra end.

Image source, Getty Images

Steve Cram
Curling commentator on BBC Two

A steal and this would be it for GB. Bruce Mouat has got to use his stone - the best he possibly can.