It's not to be for Caroline Dubois.

The judges give the final round to Thailand's Sudaporn Seesondee, and she is now guaranteed at least a bronze medal.

That really could have gone either way.

Caroline Dubois and Sudaporn Seesondee exchange hits as both desperately seek to do enough to edge this tight quarter-final.

Final 30 seconds, it's there for the taking...

Steve Bunce
Commentator on BBC Radio 5 Live

What a bizarre pattern of officiating.

It is quite straight forward, you win this round and you go onto the final.

Ronald McIntosh
Boxing commentator on BBC TV

Very good from Dubois. She's conducting herself in very composed fashion indeed on the Olympic stage and she's found her range magnificently.

Caroline Dubois is doing her best to wrestle control of this fight in the second round, but Thailand’s Sudaporn Seesondee is holding firm...

Dubois finishes the round with a flurry - and this time the judges give the Briton the round on a 3-2 split.

We're all level heading into the final round!

Team GB's Charlotte Dobson and Saskia Tidey have missed out on a medal in the women's 49er FX.

They went into Tuesday's medal race, delayed from Monday because of a lack of wind, in fifth place.

But they were unable to improve on that, finishing seventh in the medal race to end up sixth overall.

Brazil took the gold, from Germany with the Netherlands in third.

Team GB's Dylan Fletcher and Stuart Bithell go in the men's race shortly.

Steve Bunce
Commentator on BBC Radio 5 Live

3-2 seems slightly harsh I didn't think Seesondee did very much at all. I thought Dubois did enough there with strong straight jabs.

Image source, Getty Images

Thailand’s Sudaporn Seesondee made a bright start to this quarter final bout, but Caroline Dubois responds with a couple of expertly executed shots.

The judges give Seesondee a tight opening round by 3-2 split.

Alex Capstick
BBC Sport

The US Olympic Committee has cleared American shot putter Raven Saunders of breaking the rules after the silver medalist lifted her arms above her head and formed an X with her wrists on the podium.

She said it signifies the intersection of where oppressed people meet.

USOPC said her actions were “respectful of her competitors and did not violate our rules related to demonstration”.

In response IOC spokesman Mark Adams said they’re still looking into the matter. He said these Games are operating “under the Olympic Charter” implying the IOC would decide whether or not the regulations had been contravened.

Neil: Just an astonishing performance. If that wasn't the perfect race from the big Norwegian, I'd like to see what is. All the pieces came together. Not sure that record will ever be broken.

Ian: Warholm was phenomenal! World record on 400m hurdles. Just amazing! So glad I stayed up for that.

It's almost time for GB's Caroline Dubois to step into the ring.

Dubois knows victory against Thailand’s Sudaporn Seesondee will guarantee her an Olympic medal here.

Colin Jackson
Two-time world 110m hurdles champion on BBC TV

When you talk about world records, this up there with Usain Bolt's time of 9.58 seconds in the 100m, up there with Flo Jo's 10.49 seconds in the 100m.

This is one of the most outstanding world records and I'm pretty sure that world record will outlive me.

Image source, Getty Images

Men's 400m hurdles gold medallist Karsten Warholm on BBC One: "You know the cliché that it hasn't sunk in yet? I don't think it has but I feel ecstatic.

"I cant believe the time, it's so fast! A lot of the time I am asked about the perfect race. I said it didn't exist but this is the closest I've ever come.

"I told myself going in to the race, remember all the work you have put in. It was the only thing missing from my [medal] collection. I can't describe how important this is for me. This is what I do morning until night, it's huge."

Tom Holden: Possibly the greatest athletics performance of all time. Incredible scenes from Karston Warholm. You gotta feel for Benjamin. Broke previous WR by 0.6s and took home Silver.

British duo Jack Laugher and James Heatly safely reached the final of the men's individual 3m springboard final, which takes place from from 07:00 BST.

Laugher qualified in third place but he's got some work to do if he wants to catch the leading Chinese pair Xie Siyi and Wang Zongyuan.

Here are the highlights from qualifying.

The first boxing medals are up for grabs later today.

GB's Pat McCormack, the 2019 world silver medallist, fights for gold in the men's welterweight division, with Cuba's Roniel Iglesias stood between him and Olympic glory at 11:05 BST.

But first, Caroline Dubois and Galal Yafai will aim to guarantee themselves medals.

At 04:50, Dubois meets Thailand's Sudaporn Seesondee for a place in the semi-finals of the women's light division, and at 09:30 Yafai takes on Cuban Yosvany Veitia in the men's flyweight quarters.

Charlotte Dobson and Saskia Tidey, the 2020 world silver medallists, are fifth going into the medal race and are eight points off bronze.

Dobson is set to marry Dylan Fletcher straight after the Games, and his medal race takes place just an hour after Dobson’s.

That first one is just getting under way and we'll keep you updated with their progress.

Colin Jackson
Two-time world 110m hurdles champion on BBC TV

It's just breath-taking. When Warholm set off, it's the quickest we've seen him run all year.

Wow. I am truly in shock.

Benjamin must have thought, 'I can't catch him. He is unbeatable, unstoppable' and he is right.

Steve Cram
Athletics commentator on BBC TV

Tears of joy. Warholm did things that even he couldn't have imagined. If you'd said to Benjamin: 'You're going to run 46.17 seconds and you will not win'... I cannot, cannot believe that.

When we said this could be quick, we could not have imagined that.

That reaction from Warholm was priceless too.

His facial expression as the disbelief morphed into sheer joy, and the half-hearted attempt at ripping his top like the Hulk. Brilliant scenes.

Image source, Getty Images