Anna Thompson
BBC Sport in Beijing

Image source, Getty Images

Kamila Valieva, the 15-year-old Russian figure skating star who helped her team win Winter Olympic gold in Beijing, failed a drugs test in December.

Valieva, who was the first female skater to land a quadruple jump at an Olympics as her team won last Monday, had a sample collected on 25 December at the Russian Figure Skating Championships in St Petersburg.

But the positive result was only reported on Tuesday - the day after she helped to win team gold, but before the medal ceremony had taken place.

Valieva tested positive for trimetazidine, which is used in the prevention of angina attacks, but is on the banned list because it is classed as a cardiac metabolic modulator and has been proven to improve physical efficiency.

Read more on one of the stories of the Games here.

Elsewhere on the ice we're underw ay as Switzerland take on the Russian Olympic Committee. It's scoreless deep in the opening period. The Russian team has never won a medal in women's competition at an Olympics while the Swiss took bronze in 2014.

So far in the quarter-finals of women's competition USA beat Czech Republic 4-1, while Canada beat Sweden 11-0. Ouch.

Image source, Getty Images

But while out last entry points to Canada being fancied to prove more of a threat the the Russian Olympic Committee in chasing gold, the USA are by no means going to go lightly.

They lead 2-1, Ben Meyers finishing from a Sean Farrell tee up with a minute of the opening period left.

Image source, Getty Images

The USA are less favoured than Canada in terms of their chances to cope without NHL stars at the Games.

They have not won a medal outside of North America since claiming silver at the 1972 Games in Sapporo, Japan, whilst their two gold medals both came on home turf – the most recent being the 1980 “Miracle on Ice”.

Seth Bennett
Commentator on BBC TV

"USA v Canada, one of the biggest rivalries in international ice hockey in recent history. There's no doubt they can lay down a marker in this one."

You can join Seth by hitting play at the top of this page or firing up BBC One now.

Image source, Getty Images

Nick Baumgartner has been speaking to the press after his snowboard cross mixed team gold with Lindsey Jacobellis.

He was 10th in the men's individual event on Thursday.

"It's unbelievable, it's days like two days ago that make today feels so good," he said. "These tears are so much better than the ones from the other day.

"I can't tell you how much pressure is off you when you know you've got someone like Lindsey in the gate after you. When you can ride like that and you don't have to worry about stuff, you see your best come out.

"I was proud to be able to show everyone I was worth. I knew if I messed up she could cover for me, but I wanted to prove to everyone what I wanted to prove two days ago - and I did that today."

Image source, Getty Images

Jane Pike: The mixed snowboard cross was thrilling! My neighbours probably didn't think so during the quarter-final. Team GB were in mind you. I was going nuts as Charlotte Bankes tore up the course! It was insane! Was gutted they didn't make final.

Send us your views on #bbcolympics.

Right then. If you're just tuning in you missed a thrilling new event at the Winter Olympics, with USA taking gold in the snowboard cross mixed team event.

Teams of two - one man and one woman - hurled down the slope individually. The male time set the handicap for the women's race that followed.

Over a quarter-final, semi-final and final the US team of Nick Baumgartner and Lindsey Jacobellis took gold. Great Britain ended sixth.

The US team had a combined age of 76, which we loved. Throw in the fact Jacobellis also won individual gold earlier this week and it was story on story.

Watch it back in short form my brothers and sisters...

Steve Cram
Curling commentator on BBC TV

It’s a victory for the 2018 Olympic champions over the 2014 Olympic champions.

It was a great match and there are finally hugs and smiles from the Swedish team.

They made that a bit of a struggle in the end, they had more than one opportunity to make it easier for themselves.

They now have two wins and one loss. Canada have one win and two losses from their first three matches.

The morning session is over and defending champions Sweden have sneaked a 7-6 win over Canada.

The Canadians needed a two, with last-stone advantage in the final end, but could only work one.

Japan, who were also trailing 7-5 going into the final end, closed with a big double take out to fashion three scoring shots to snatch victory and improve their record to two wins from three.

Hold on there cowboys. I know it's Super Bowl weekend but these guys are trying to steal the show.

Just 2 minutes and 34 seconds on the clock and it's 1-1, Andy Miele levelling for the US.

Canada are at it early and Matt Robinson sweeps them ahead.

Both of these sides won their opening fixtures, the US beating China in ruthless fashion 8-0, Canada hammering Germany 5-1.

Brothers, sisters. Pass me a puck and point me to the face off. We have ice hockey brewing. Not just any ice hockey, I'm talking USA v Canada.

It could be a little spicy!

Some of you may recognise the Behrami surname from Premier League football.

Valon Behrami - once of West Ham and Watford - is married to Swiss downhill skier Lara Gut-Behrami and she will be taking a gold medal back to base after a superb display in the Super-G.

"I just thought it was probably going to be my last Olympic super-G of my life and I just wanted to show something great. I just wanted to ski," the 30-year old said.

Olympic gold sounds like something great to me Lara.

There was no dream ending for American Shaun White in the men's half-pipe.

White has become a face for all things snowboarding and was at his fifth Olympics, where he ultimately finished fourth.

The man who became snowboarding's first three-time Olympic champion in 2018 told BBC Sport: "Everybody's asking me what's my legacy? I think you're seeing it.

"I'm proud of these guys, and the women too. To see the progression from where it started to where it is today, and to have a helping hand in that and see where they take it from here, but it's been amazing."

Take a look at his journey below or read this cracker on his Olympic adventure.

While Great Britain's men are off to a satisfactory start the women's team have just one win in three after losing to South Korea on Friday.

Catch up on it here but I can tell you the women are eighth in the round robin standings and four progress. Plenty of time left though...

Great Britain's men made it two wins from three in their group by beating Norway on Friday. The British team sits third in the round robin standings and four teams go through.

Suzanne Schulting of the Netherlands is having a swell time at the Games so far. She crashed out of the mixed relay but has now bagged a silver medal and followed it with gold in the women's 1000m.

You can watch her rip through the ice...

Looking for a one-stop shop to round-up the day-seven action? We've got you my brothers and sisters...

If you missed some of day seven fear not as I'm about to pile a tonne of jumps, sprints and everything else you can think of your way.

One of the tales of the day saw Japan's Ayumu Hirano produce the equivalent of a last-minute winner. He only went and took Olympic gold with the last run of the day in the snowboard half-pipe.

That's how it's done my friends...