If you're wondering why the World Athletics Championships have been replaced on BBC Two by the Hairy Bikers, it's because we've moved over to BBC One.

Switch over and join us for the day's final event, the men's 1500m final (14:20 BST). Or you can click on the link at the top of this page.

Josh Kerr, Jake Wightman and Neil Gourley are all involved as Great Britain look for a first medal of these World Championships.

Stefanie Reid
Three-time Paralympian

It all starts with that run.

Of course, your gymnastic ability is really important but you have to have that energy and elastic power from the pole otherwise you will not go anywhere.

Image source, Getty Images

Great Britain's Tyri Donovan speaking to BBC Sport after his personal best in the men's 400m semi-finals: "It was such a lovely opportunity to step out after the heats and to back up my performance.

"I am disappointed to miss out on the top eight but it is still a massive achievement for me.

"In the heats I felt so comfortable, but the second round is starting to feel like a natural environment as well. I want to continue to pursue that now.

"I have had people like Karsten Warholm take the time out of their day to talk to me. It is such a lifelong opportunity and to take that advice from people like him, I am so proud to get that opportunity."

Stefanie Reid
Three-time Paralympian

You cannot believe that stayed on!

She was under so much pressure. Somehow Katie Moon finds a way to make it happen no matter what.

Unbelievable!

Katie Moon has to clear 4.90 metres to stay in contention for gold... and she does it! The bar wobbles as she clips it with her chest, but it doesn't fall.

The American is just the 14th woman in history to clear that height.

Over to Sandi Morris, who has elected to skip her third attempt at 4.90m and will now attempt 4.95m.

Rai Benjamin of the United States wins the third and final semi-final with a time of 47.95 seconds.

Having established a big lead at the 300m stage, he eased off and was almost jogging at the finish line having eased off.

Alison dos Santos of Brazil takes the second automatic qualifying place with 48.16, while Great Britain's Alastair Chalmers finishes sixth in 49.49.

Harry Poole
BBC Sport in Tokyo

There's just something about the pole vault in particular that completely captivates a crowd.

It certainly helps when you have a superstar like Mondo Duplantis grabbing record-breaking headlines, and Americans Katie Moon and Sandi Morris are attempting to put on a show as the pair, with eight global medals between them, battle for gold.

Only 13 women in history have managed to clear 4.90m - the height they are currently aiming to clear. These two are both among the select few to have done it before.

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

Another strong semi-final.

It is interesting to see what the different approaches are to these races.

When you have quite an even field, you have to decide whether to take the risk or to just sit back and chill and hope that you don't need to do a lot.

Nigeria's Ezekiel Nathaniel takes semi-final two, finishing in a time of 47.47 seconds.

Ismail Doudai Abakar of Qatar takes the second final place with 47.61, while American Caleb Dean's 47.85 in third knocks Great Britain's Tyri Donovan out of the non-automatic qualifying positions.

Image source, Getty Images

Tina Sutej of Slovenia bows out with a no-jump at 4.85 metres, meaning she will take home the bronze medal.

Over to Americans Sandi Morris and Katie Moon to scrap it out for the gold medal.

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

Great run from Tyri Donovan. You want to give yourself the best option you can by running a personal best.

We have seen lots of people falter already in 400m hurdles so Donovan has done very well.

Again, world champion Karsten Warholm goes through, but not in first position.

He takes second in semi-final one with a time of 47.72 seconds, behind Abderrahman Samba of Qatar who wins with 47.63.

Great Britain's Tyri Donovan is fourth with a personal best 48.21 and for now occupies the second of the two fastest non-automatic qualifier positions, with two further semi-finals to come.

The big three all feature in the men's 400m semi-finals, though world champion Karsten Warholm only just sneaked third place in his heat to secure automatic qualification.

The Norwegian is responsible for 10 of the fastest 24 times in history, though in June he was well beaten by main rivals Rai Benjamin and Alison dos Santos in Stockholm.

Olympic champion Benjamin cruised into the semis with the second fastest qualifying time, so he'll be looking to conserve energy ahead of his bid to win a first World Championship gold.

Dos Santos was not the fastest Brazilian in qualifying - that honour went to Matheus Lima - but this year has looked close to the level he was at in 2022 when he became world champion.

Qatar's Abderrahman Samba topped the qualifying rankings so is one to keep an eye on, as is Great Britain's Tyri Donovan, who clocked the fourth fastest time.

Alastair Chalmers is Britain's other representative in the semi-finals.

We're through two of six attempts in the men's long jump final, and China's Yuhao Shi and Jamaica's Tajay Gayle lead the way with a distance of 8.33m

Favourite Miltiadis Tentoglou of Greece is back in ninth of the 12 finalists, having only managed two jumps of 7.83m thus far.

Dame Jessica Ennis-Hill
Three-time world heptathlon champion on BBC TV

Image source, Getty Images

Femke Bol does not want to shy away from the big rivals.

She is so well experienced and you can see by the way that she runs - the way she trains must be so high.

She does not even look out of breath over the hurdles. What a fantastic run.

Great Britain's Zharnel Hughes qualified second behind Noah Lyles in his 200m heat earlier.

Stefanie Reid
Three-time Paralympian

Image source, Getty Images

That is the best Sandi Morris has looked this competition.

She has had rotten luck these past few years and she deserved to keep that bar hanging on there.

Image source, Getty Images

Drama in the women's pole vault final!

Sandi Morris takes the lead by clearing 4.85 metres at the first attempt, and she'll stay there for now as co-champion Katie Moon fails for the first time today!

Olympic silver medallist Anna Cockrell doesn't have to do much to win the final semi-final, crossing the line in a rather modest 53.28 seconds.

Jamaica's Shiann Salmon is second in 54.03, while third-place Amalie Iuel's 54.28 is not quick enough to take one of the two fastest non-automatic qualifiers spots.