The British skeleton team - among Team GB's best hopes for medals at the Winter Olympics - have had an appeal dismissed by the Court of Arbitration for Sport (Cas) over a new helmet design.

The British team appealed Cas after the International Bobsleigh and Skeleton Federation (IBSF) said the helmets "did not comply with the IBSF skeleton rules based on its shape".

The British Bobsleigh and Skeleton Association (BBSA) said the helmet was designed with safety in mind.

The Cas judgement said: "The panel noted that the helmet departs from the standard shape and reflects a novel design specifically developed to enhance aerodynamic performance where the rear considerably protrudes.

"The panel determined that the BBSA did not sufficiently establish that the helmet complies with the current IBSF Rules."

The team will now wear helmets that they have worn during World Cup competition this year.

Disappointment for the home fans as Ian Matteoli goes down on his first jump. Just a 26.25 for the Italian.

All is not lost with the best two of three jumps counting towards the final score. But pressure is on for the last two jumps now.

Matteoli is certainly not alone in failing to land his first jump with Japan's Hiroto Ogiwara - who topped the leaderboard in qualifying - doing the same to end the first run in 12th.

His Japan team-mate Kira Kimura is on top after a putting up 89.00 to edge ahead of China's Su Yiming.

Don't go anywhere, the second run is beginning any second now...

Backside 1980 from defending champion Su Yiming of China - that's incredible!

A pretty heavy landing... but that doesn't put off the judges.

Su is straight into the gold medal spot with his 88.25. But we've still got the top qualifiers to come.

Katie Falkingham
BBC Sport in Livigno

There are plenty of hardy souls braving the freezing temperatures to watch the big air tonight. The app on my phone says it’s currently -8.

Ian Matteoli a big home hope for the Italians here.

Image source, BBC Sport

Japan's Ryoma Kimata, the world champion, jumps into an early lead with a big score - 86.25!

He stays in the gold medal position at the halfway stage after Rocco Jamieson of New Zealand fails to land his jump cleanly.

But his fellow Kiwi, Lyon Farrell, has no such issues - landing the 1800, five full spins, to score 83.50.

Kimata keeps the lad with Farrell in the silver medal position.

Image source, Getty Images

Chemmy Alcott
Four-time Olympic alpine ski racer on BBC Two

I think the Japanese riders have so much depth in their team. They have three turns tonight, so for the first one they will play it safe.

They will look at the temperature and how it has dropped and how that has affected the snow. Once they have ticked that box, the second and third attempts will be their limits.

Here we go then Valentino Guseli of Australia...

Impressive stuff but he needs to use his hand to steady himself on the landing and that'll cost him big time.

He scores a 23... and is immediately blown out of the water by New Zealand's Dane Menzies.

A frontside 18, five full rotations, and lands it cleanly to score 81.25 - a big early lead for the Kiwi.

Katie Falkingham
BBC Sport in Livigno

Image source, Getty Images

What a story Australia's Valentino Guseli is.

On Wednesday night, he was on the reserve list. Then Canada's Mark McMorris crashed in training and suddenly he was elevated to the start list for qualifiers.

And then it got even better.

On his third and final run, he scored a massive 91.50 to secure the last spot in tonight's final.

What can he do tonight? He's first up.

Chemmy Alcott
Four-time Olympic alpine ski racer on BBC Two

There are so many elements to the big air. It is unbelievably complex.

The progression of the sport is so huge. Athletes want to see their sport keep on developing. They want to be part of that. It doesn't matter who is winning. It is so exciting.

Image source, Getty Images

The home interest in this one comes from that rarest of beings, an Italian Ian.

Yes, you read that correctly. Ian Matteoli is the sole Italian representative and impressed in qualifying, coming second to boost hopes of another medal for the hosts.

The 20-year-old has battled back from a bad fall in February 2023 that resulted in him rupturing his spleen and requiring emergency surgery.

Matteoli, who was born Bardonecchia, just west of Turin, hasn't had the best season but looks to have found form at just right time.

Emma Smith
BBC Sport at Milano Ice Skating Arena

Good evening from the Milano Ice Skating Arena, where we wait in anticipation of the 'Quad King'.

Ilia Malinin of the United States is expected to be one of the stars of this Games. The 21-year-old is the only man to ever land the quadruple axel - the most difficult element in figure skating.

He is the USA's representative in the men's section of the team event, and I am reliably informed that he will be attempting his signature move as the first trick in his routine.

Keep an eye out for him at around 20:00 GMT.

Team GB freestyle skier Kirsty Muir qualified for Monday's slopestyle final earlier. Here's what she had to say about it: "I am feeling really relieved. I was really nervous this morning. Putting a good run down in the qualifications was important for me because I wanted to be in that final.

"In the qualifying, it is sometimes more nerve-wracking. Whereas, in the final you go all out and you either get it or you don't. That's what I am going to be ready for.

"Things will change after practice tomorrow so I will use that and see what I can do."

On how she is enjoying Italy: "I am enjoying Italy and having a slice of pizza a day. I might get a full one today!"

We're finished in the ice hockey for the day, with the United States completing a 5-0 win over Finland.

That's two wins in two for the USA, while Finland fall to defeat in their first fixture after having their first match postponed because of an outbreak of norovirus earlier in the week.

Earlier in the day, Germany beat Japan 5-2 and Sweden defeated Italy 6-1.

Ask Me Anything

Big air is the newest discipline in Olympic snowboard, having made its debut at the 2018 Winter Games.

Athletes ride down a ramp and perform one trick when they launch into the air and land in a designated zone.

There are three jumps to execute, with the scores from two highest-scoring tricks combined to determine the athlete's overall ranking.

Big air is scored under four categories: difficulty, execution, amplitude and landing (DEAL):

• Difficulty: Athletes are rewarded for doing brand new tricks. Generally, more spins and flips, the more points athletes will pick up
• Execution: Points are scored by how an athlete maintains control of the trick, holding grabs properly for as long as possible. The judges look for clean techniques and athletes making difficult moves look easy
• Amplitude: Athletes must land in a designated spot in a sloped area. Judges can mark down if there is too much or too little amplitude
• Landing: Athletes must land in full control when the trick is completed. Judges do not want to see reverts, where a trick has landed but the board is still spinning. Reverts count as a fall in big air

This should be fun!

It's the men's big air final and 12 of the world's top snowboarders will be showing off their tricks in one of the most spectacular sports on the Winter Olympic programme.

It looks like an open competition but Japan's team is full of talent, including reigning world champion Ryoma Kimata and overall World Cup winner Taiga Hasegawa.

It was another Japanese athlete, Hiroto Ogiwara who finished top in qualifying so will be last up in the final.

The first of three runs begins at 18:30 GMT.

20 of the 50 athletes in the women's normal hill have already hurled themselves into the Italian sky, with qualification going at a fair old pace.

Canada's Nicole Maurer currently leads the way with 116.3 points - they're awarded for both distance and style.

The event is currently live on iPlayer and Red Button, should you wish to tune in.

Image source, Getty Images

Germany's Max Langenhan has regained his place at the top of the men's singles standings.

The reigning world champion was 12th to go on the second run, and now has an accumulated time of 1:45.826.

He moves back above Austria's Jonas Mueller, who is second with 1:45.988.

Langenhan's compatriot Felix Loch is eighth with a time of 1:46.745.

We're almost ready to go in tonight's session of ski jumping.

50 athletes will compete in the first round of the women's normal hill, with 30 going through to the final round later tonight - that's where the medal is won.

No Brits in this one, or indeed any of the ski jumping events, I'm afraid.

Katie Falkingham
BBC Sport in Livigno

I snapped this (absolutely terrible) photo of the big air on my way into the snow park tonight.

Until you see it in the flesh, it's impossible to comprehend how big a structure it is.

Arriving into Livigno on Sunday night, we turned a corner and suddenly there it was, lighting up the night's sky. WOAH.

Image source, BBC Sport

As the luge gets back underway with its second run, let's take a look back at Franjo von Allmen winning the first gold of this Olympics in the downhill.