Rob Hodgetts
BBC Sport in Sochi

"Bode Miller update - news reaches me that the American tweaked his rebuilt left knee during the first run of the giant slalom and may pull out of Saturday's slalom.

"The 36-year-old, who won bronze in the Sochi super-G for a sixth Olympic medal, missed most of last season coming back from knee surgery.

"No immediate news on whether he'll do the second GS run."

Image source, Team GB

Team GB on Twitter, external: Pride and Komak are ready - are you?

Sweden beat Slovenia 5-0 to progress to the last four of the men's ice hockey competition. They will face either Finland or Russia who play their quarter-final at 12:35 GMT.

GB on the back foot in the second end, with Canada freezing on the British stone in the centre of the house to lie shot with six to play. Hopes of a two look slim for Britain.

You can follow this match on BBC Two or via the video stream at the top of the page.

Rob Hodgetts
BBC Sport in Sochi

"Giant slalom leader Ted Ligety knows the job is only half done ahead of the second run at a sunny Rosa Khutor. The American said: 'I'm 50% of the way there. I have to go hard on the second run. This is skiing - it's the least guaranteed sport for a medal. Anything can happen.'

"Ligety, who holds a lead of 0.93 seconds over Czech Ondrej Bank, said: 'Sometimes my best or fastest run doesn't feel like that. I actually felt at times I was going a little too cautiously, but I managed to get a nice buffer.

"'Conditions changed a lot overnight. It's almost like winter now; it's a lot less summery than it has been.'"

The second run of the giant slalom starts at 10:30 GMT.

Steve Cram
BBC Sport curling commentator

"That is not the start Great Britain wanted or needed. Canada take a two-shot lead and nothing you can do other than pick yourselves up and carry on. Jennifer Jones needs to be put under as much pressure as possible - she has been known to crack in the past."

As expected, Canada take a 2-0 lead after the first end. Not much more GB skip Eve Muirhead could have done after that pick-up changed the direction of her stone and meant she missed the Canadian boulder sitting in the house.

Rob Hodgetts
BBC Sport in Sochi

"Bode Miller said he knew his first run of the giant slalom was going badly four turns in. The American ended 2.56 secs adrift of countryman Ted Ligety in 26th place after run one and admitted the 10cm of overnight snow had caught him out.

"'I knew after four turns I was in trouble,' he said. 'We didn't anticipate the snow being as good as it is. It's some of the best snow we've had all year. We made some big changes last night after watching the women's. I thought I needed something to ski in the soft stuff. I probably should have a couple of different set-ups.'"

No-one taking any risks in the first end, with each team taking the other's stone out. But it's Britain who make the first mistake as Eve Muirhead completely misses the Canadian yellow stone. It looks like there was some pick-up on the ice with Muirhead removing some bits of debris from the ice. Unfortunate that. Looks like GB will go a minimum of 2-0 down here...

Anna Thompson
BBC Sport in Sochi

"The rock music and bagpipes, which traditionally accompany the teams on the ice, have given way to the sound of cowbells, which ring out when a good shot is played. Canada skip Jennifer Jones has a 10-4 record over Eve Muirhead but in play-off matches Muirhead edges it 4-3."

Interest in curling is sweeping the nation (sorry) with people of all ages glued to their screens and coming up with innovative ways of creating their own version of the game.

Robert Jones, external tweeted a picture of Oscar, three and Tilly, one, from North Somerset, getting some practice in ahead of the semi-finals. Tweet us your pics via the #bbcsochi hashtag if you're getting involved in curling.

Image source, Robert Jones

Steve Cram
BBC Sport curling commentator

"Canada, who are unbeaten, maybe can't keep playing as well as they have been. I'm quietly confident. Eve has beaten (Canadian skip) Jennifer Jones on numerous occasions. I've just been listening to the Canadian commentators and they are scared of Eve Muirhead and perhaps that will be how the team are feeling too."

The teams are just sliding down the sheet with their brooms to get a feeling from the ice. Canada have the hammer which means GB will open the match with the first stone.

Eleanor Oldroyd and Chris Mitchell will provide updates for 5 Live.

Eve Muirhead and her team head out into the Ice Cube Curling Centre to the sound of bagpipes. There's a good turnout of support with lots of British and Canadian flags dotted around the stadium.

World champions and 2006 gold medallists Sweden have upped the tempo in their quarter-final against Slovenia as the Olympic debutants start to tire. Goals from Daniel Sedin, Loui Eriksson and Carl Hagelin in the third period see Sweden lead 4-0 with less than 10 minutes remaining.

Alistair Canlin:, external I've become addicted to curling. Walking past street sweepers this morning I found myself shouting "Hard! Hard!"

Steve Okey:, external My day off today is planned entirely around the Team GB curling semi-finals.

Gary Taylor:, external Would love to be watching team Muirhead this morning but when I do, they lose - I'm obviously a jinx!

Just five minutes until GB's Eve Muirhead leads the team out into the Ice Cube Curling Centre against unbeaten Canada. Get the kettle on, raid the biscuit tin and settle in for a tense few hours.

Jackie Lockhart
2002 world curling gold medallist on BBC TV

"Eve and the team have not had the best time in the group stages but they are in a knockout situation now and often that is when Eve and her team will come to the fore. They are used to nervousness and tension. I hope they bring their 'A' game."

Image source, PA

Four million people stayed up long past midnight to watch Rhona Martin win curling gold with her final shot in 2002. Now Martin, who these days uses her maiden name Howie, coaches Eve Muirhead's team.

"The team has so much experience at big events and although the Olympics are a bit different, they've worked very hard on the mental side of their game and they know they have to be tough," said Howie.

"In 2002 we also scraped through to the semi-finals to play Canada, so it doesn't matter how you get there - they're there and playing Canada and it's a great opportunity to cause trouble.

"We do sometimes chat about what happened in Salt Lake and my experiences in Salt Lake, but we don't put too much importance on it. After all, it was 12 years ago."

There are 10 ends in a game and eight stones delivered by each team per end. Matches take about three hours using stones that weigh 19.1kg. The playing surface, known as the sheet, is 45m long with curlers covering a distance of 5km over the course of a match. A good sweeper can make the stone move an extra 3m with curlers burning a maximum of 1,800 calories.