Image source, Getty Images

Well then, day eight of the world championships was packed with some superb sporting action.

Fast finals, shared medals, relay chaos - we had it all.

Alas, tomorrow is the final day of the championships, but it's jam packed with drama as nine events come to a conclusion.

We'll see you then.

Harry Poole
BBC Sport in Tokyo

Great Britain's Katarina Johnson-Thompson captured an emotional fourth global heptathlon medal in unprecedented circumstances as she shared world bronze with American Taliyah Brooks in a dramatic concluding 800m in Tokyo.

Competing at the stadium where she suffered Olympic heartbreak four years ago, Johnson-Thompson, 32, did not know how to react as she continued her late-career resurgence by making a third consecutive major podium.

Needing to beat Brooks by about six seconds to leapfrog her rival on to the podium, Johnson-Thompson wore a puzzled look as it was confirmed they had finished on exactly the same points.

But the tears began to flow when her name - and Brooks' - appeared lit up in bronze on the big screen, tied on 6,581 points to become the first heptathletes to split a world medal.

American Anna Hall claimed a breakthrough world title triumph and Ireland's Kate O'Connor held on for a historic silver, after three-time Olympic champion Nafi Thiam withdrew from the competition when ranked eighth earlier on Saturday.

You can read Harry's full report here.

Image source, Getty Images

Some late news - we'll get a couple of extra relays on tomorrow's final day.

The United States and Kenya will contest a shoot-out men's 4x400m to qualify for the final after Zambia were disqualified for an infringement.

Italy have been disqualified from the men's 4x100m final for infringing South Africa, who were unable to finish their heat.

The South African team progress to the final and will get to do a solo relay beforehand to decide the lane placings.

Great Britain's Dina Asher-Smith, Success Eduan, Desiree Henry and Daryll Neita qualified for the women's 4x100m relay - but a baton blunder between Jona Efoloko and Eugene Amo-Dadzie saw the men's team miss out.

Speaking of relay madness, we have some interesting news...

• Katarina Johnson-Thompson shared bronze in the heptathlon with American Taliyah Brooks after they finished level on points.
• Jade O'Dowda placed eighth in the multi-discipline event, but Abigail Pawlett wasn't placed after pulling out of the final two events.
• Max Burgin finished sixth in the men's 800 final, setting a personal best of 1:42.29 in a fast race.
• Hannah Nuttall came across the line in eighth in the women's 5,000m final.
• Lawrence Okoye and Nick Percy went out in men's discus qualification.

Jenny Meadows
Former 800m World Championship medallist on BBC TV

Jenny Meadows on Max Burgin finishing in sixth in the men's 800m final: "I think Max didn't really do anything wrong. He did brilliant to get himself up to that third place. He tried to win the gold, he didn't just try to medal.

"Unfortunately, he didn't have the gap and he got caught up with around 150m to 100m to go. He just couldn't find that gap. He thought about going on the inside, he came out wide and then obviously your legs are gone. He is running a personal best time but I do just think that was an opportunity missed. I do know he's good enough."

United States are running away with things at the top of the medal table.

Great Britain and Northern Ireland, set a target of top eight, are down in 22nd but have medal hopes on Sunday's final day.

GB are just three places above the Republic of Ireland.

Max Burgin speaking to BBC Sport after finishing sixth in the men's 800m final: "In a sense [I am proud ] winning personal best pretty means you're operating close to maximum. If I were to have got that time in any other race this year I would have been buzzing but in that one there it just feels disappointing really. It's just wasn't meant to be.

"Positioning wise even up until 600m I thought I was in a good spot but with 200m to go I should've moved wide earlier because I couldn't get through.

"When I come to terms with this race I think I'll look back on this season and be happy with what I've achieved. It wasn't to be today but that doesn't reflect on the season as a whole."

Katarina Johnson-Thompson speaks to BBC Sport as she reacts to that extraordinary shared bronze medal.

Great Britain's world champion Katarina Johnson-Thompson shared third place with USA's Taliyah Brooks after her 800m time brought the two equal on 6,581 points overall at the World Athletics Championships in Tokyo.

Here's how a truly unprecidented finale played out...

Before the 800m, we had the final event in the first half of the decathlon.

Ayden Owens-Delerme absolutely stormed out of the blocks in the final heat of the 400m. Having established a big lead he stalled on the final straight, but managed to hold off Harrison Williams of the United States.

That takes the Puerto Rican into third in the overall standings, behind American Kyle Garland.

Sander Skotheim of Norway and Leo Neugebauer, second and third in the standings going into this event, finish fourth and sixth here - although the heats are seeded, so six of the seven fastest times were in this race.

That brings the decathlon to a close for today - we'll return tomorrow for the final five events.

Harry Poole
BBC Sport in Tokyo

What a final.

A championship record, national records and lifetime bests all over the shop.

A personal best for Max Burgin, too. He went for gold and, somehow, one minute 42.29 seconds only gets you sixth these days.

He remains the third-fastest Brit in history but edges closer to Sebastian Coe's British record. Relief for the current World Athletics president. But Burgin is coming...

Image source, Getty Images

Max Burgin chucked an entire bottle of water over himself before speaking to the BBC's Sarah Mulkerrins.

He's soaked, no word yet on whether Sarah stayed dry.

Max Burgin went with the best in the world there, and at the turn for home it looked like he was right in medal contention.

But he got crowded out on the inside of the track, and ultimately faded in the final few metres.

Burgin finished sixth in 1:42.29 - a new personal best.

So near, yet so far.

That was a high quality final, records falling everywhere.

Algeria's Djamel Sedjati takes silver with bronze to Marco Arop of Canada - both in season best times.

Ireland's Cian McPhillips finished like a train and so nearly snatched a medal. He came fourth while cutting a second off his national record time.

Goodness that was a quick race.

Emmanuel Wanyonyi led from the off and looked to have gone too fast too early, but he found a second wind in the last 100m to hold on for gold.

1:41.86 from the Kenyan, a new championship record. This 21-year-old is a real talent.

Image source, Getty Images

Wanyonyi is stretching his legs, followed by Marco Arop.

Max Burgin is in touch...

Emmanuel Wanyonyi of Kenya is the Olympic gold medallist and quickest this year. He leads after the first lap.

Max Burgin is third.

They're off!

The only British men to win world 800m medals are Peter Elliott with silver in 1987, and Ben Pattison with bronze in 2023.

Let's see if Burgin can join their pantheon.