We have a text from a genuine Olympian here. If it is the Brian Green that is.

A fair point?

Brian Green, Munich 1972 100m 200m 4x100m

What better legacy is there than having someone's pets named after you?!

You know you've made it.

Image source, PA

Russian Maria Lasitskene, competing as an independent athlete, won gold in Beijing two years ago and boasts the top 10 jumps of 2017. The 24-year-old has won her past 22 competitions and is the clear favourite. Among the chasing pack are two British heptathletes by trade - Morgan Lake and Katarina Johnson-Thompson.

Image source, AFP/Getty Images

Kevin Mayer has the honour of throwing last in the decathlon javelin and he sends his first effort out to 66.10m. That puts him second in the group after one throw.

He leads overall by 116 points going into the javelin.

We've just seen Usain Bolt and co in the warm-up track. Bolt with shades on and a languid stride, he could not look more relaxed.

Is it gold again tonight? Can the Brits get a medal?

Image source, Getty Images

He may have 'only' ran 20.52 in the 200m to not reach the final but Usain Bolt believes having team-mate Yohan Blake in the team bodes well tonight.

"We have been training that relay, there were some cramps," he said after this morning's heats.

"Still there were some mistakes. Yohan Blake coming in for the final is definitely good."

Team-mate Julian Forte said: "I really just wanted to get the baton round."

Quite right...

Is that the problem that athletics - and the marketing board - face?

Wayde van Niekerk has been talked up as the next 'face of athletics' but for all his ability and talent he's not Usain Bolt is he?

Image source, AFP/Getty Images

Michael Johnson
Four-time Olympic gold medallist athlete on BBC TV

Usain Bolt is uniquely fit for the role he took on.

He doesn't try to be who he is. He just is what he is.

Nobody can be him! Nobody can be Usain Bolt.

To say someone could be the next Usain Bolt is ridiculous.

Tom Fordyce
Chief sports writer at London Stadium

After a few flat nights and questions over the scheduling, this is one of the humdingers - a complete sell-out in the stadium, not even a single seat to be had anywhere in the place, the Jamaican and GB flags being hawked by street traders on the way in, the weather warm and the anticipation tangible.

An alternative discussion point for tonight:

Have you ever had a six-year winning streak at anything before?

Image source, Getty Images

Again, let me know on 81111 or at #bbcathletics.

Image source, Getty Images

Mo Farah’s major championship track farewell could see him claim a fifth successive 5,000m and 10,000m double at a major championships, going back to the London 2012 Olympics.

Since 2011 he has won 20 of his 21 5,000m contests, the only defeat coming at the Prefontaine Classic in Eugene in June 2013.

As we say goodbye to Usain Bolt and Mo Farah here's a run down of the women with the most gold medals in the world championships.

Allyson Felix has won two golds and a bronze in the 4x100m relay in the past so there's a chance she could feature tonight...

Image source, BBC Sport

Usain Bolt will appear for the last time at a major championships tonight after Jamaica qualified for the men's 4x100m relay final.

Bolt anchored the quartet to victory in 37.95 seconds in their morning heat at London Stadium.

Bolt, who finished third in the individual 100m behind winner Justin Gatlin and Christian Coleman, said: "I enjoy relays more than anything.

"We'll see what happens. It's hard to be sad, the energy, the vibe here, it's been brilliant."

Hero the Hedgehog has taken the art of the mascot to a new level at London 2017, but it seems he's been just as busy outside the stadium at Team Personal Best events.

There are athletics-related activities carrying on throughout the rest if August and September, so check out the TPB website, external to see what's in your area and get involved!

Find out more about running and athletics with our Get Inspired guides.

Just that one silver. What a haul for Mo Farah...

Image source, BBC Sport

Denise Lewis
Olympic heptathlon gold medallist on BBC TV

Being a long distance athlete like Mo Farah is actually boring! You have to take yourself away from everything and dedicate your time to training camps and recovery.

He has no time to live the "celebrity" lifestyle.

You have got to get your head in that mindset. There will be plenty of time for people to get to know Mo in his retirement.

Paula Radcliffe
Women's marathon world record holder on BBC TV

Mo Farah had to run so hard for that 10,000m last week.

We have not seen him have to work that hard in any of those previous global doubles - it has come easier in previous years.

The key thing for him tonight will be to stay on his feet.

Illness continues to affect these championships and Mo Farah has one less rival to worry about tonight as Ryan Hill has pulled out of the 5,000m because of illness.

The women's 3,000m steeplechase... hard to believe as the event is not usually one to light up a meet.

However, last night's race was full of excitement and drama. And more success for the States.

Watch the moment one of the favourites for the title, Kenya's Beatrice Chepkoech, went the wrong way, nearly missing the first water jump here.

But here is the moment Emma Coburn beat compatriot Courtney Frerichs to lead home an American one-two.

Did you know:The last American to win the steeplechase at a major event was Horace Ashenfelter at the 1952 Olympic Games in Helsinki. He was a full time FBI agent with four sons at home. He managed to fit in training in the local park by moonlight, using benches as hurdles.

US athletics had a fallow few years - by their own high standards - winning six golds two years ago and finishing behind Kenya and Jamaica.

They are wiping the floor with everyone in London.

The hosts? Not so much...

Image source, BBC Sport