This was worth the admission money alone.

Steve Cram and Michael Johnson hammer out the rights and wrongs of the Justin Gatlin situation and the media's responsibility to accurately portray the sport's relationship with doping rather than a caricature.

Steve Cram
BBC athletics commentator on BBC TV

What about Rosangela Santos? That was a cracking run. No wonder she screams with delight. That's a South American record.

Darren Campbell
Former British sprinter on BBC Radio 5 live

I could watch Elaine Thompson run all day. In the first 30m the other athletes thought they were with her, but she went into her turbo phase and stepped away from the field.

She didn't slow down but chopped her stride. She is capable of something special later.

Elaine Thompson scampers clear, but she has company.

Rosangela Santos of Brazil comes home in a new personal best and south American record of 10.91.

Desiree Henry was down in fifth in 11.24 and won't be making the final. And neither will Daryll Neita.

Image source, Getty

Olympic champion Elaine Thompson is the one to beat in this semi-final and indeed in the final.

The Jamaican did the 100m-200m double in Rio and cruised through the early stages without breaking sweat in 11.05 seconds.

She was so comfortable in the heats she ran as Helen Bonham Carter's Bellatrix Lestrange.

It is going to be tight behind her though.

Great Britain's Desiree Henry has a decent chance of going better than the fourth place she registered in the Olympic semi-final.

BBC Sport's Sam Bryant at London Stadium: "Spot the (thousands of) differences.

"This first picture was taken at 07:30 today, with just a few hardy stewards and officials making their way to the London Stadium.

"It's a different story this evening though, as thousands of fans (plus a few extra clouds) flood down for another night of exciting athletics. Tickets are once again like gold-dust, but the crowd will have to go some to match the noise we heard on Saturday night!"

Image source, BBC Sport

Image source, BBC Sport

Ben Quick: Michael Johnson saying a story has been created which is not accurate. Is Gatlin not a 2 times banned athelete?

Phil Bell: Steve Cram - couldn't agree more. Totally let down from the top. Athletics headings towards cycling in terms of suspicion.

Fiona Lapham: Such a heated debate in regards to Gatlin, I get both sides, but I'm with Michael Johnson on how situation has been handled.

Britain's Daryll Neita must wait to find out if she advances as a fastest loser.

"Fingers crossed. Maybe. Who knows?" she tells BBC Sport. "I feel like it is the momentum of last year, and getting the bronze in Rio has given me so much confidence. Thank goodness for the crowd. They've been great."

Steve Cram
BBC athletics commentator on BBC TV

I am never going to sit here and be an apologist for Justin Gatlin. Once they got over the booing of Justin Gatlin last night it was a celebration of Usain Bolt.

I think the British people are fair and have said their bit.

It is about what he [Gatlin] represents less so Justin Gatlin himself.

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

Marie-Josee Ta Lou ran a very well balanced race. This young lady has announced herself and will be ready for the final.

To finish in fourth, Daryll Neita has done well and set herself up for the rest of her career.

A very impressive run from Ivory Coast's Marie Josee Ta Lou who runs a very even, very fast race to win in a season's best, a couple of metres clear of Dafne Schippers.

Great Britain's Daryll Neita is fourth in 11.16. Will that be enough for one of two fastest loser spots? Possibly not. Let's see.

Tony Data Man: A cheat is a cheat and should never be allowed to compete again. Do you trust liars?

East Fife 4 Forfar 5: Booing athletes is wrong. Sport needs to be a place for redemption & forgiveness, but a double unrepentant cheat?

Remembot: I remember Chambers being booed by the crowd at the 2012 Olympics. We will always boo cheats if we know about them.

Image source, AFP

Daryll Neita - part of Britain's bronze medal-winning 4x100m relay team - is the first of the home hopes up in 100m action.

She will have to pull something out of the bag to make the final though. She is only seventh fastest in her semi-final based on this season's times.

Instead it should come down to a scrap between Netherlands' Dafne Schippers - who won silver in this event at the last world championships - Ivory Coast’s Marie-Josee Ta Lou - second fastest in qualifying -and Kelly-Ann Baptiste of Trinidad and Tobago.

Two to go through automatically with two fastest loser spots.

Image source, Getty Images

Olympic champion Katerina Stefanidi is also top of the world standing for 2017 and cleared the highest mark in qualifying.

American Sandi Morris took silver in Rio and is likely to be the main threat to the Greek.

Ben Quick: Michael Johnson saying a story has been created which is not accurate. Is Gatlin not a 2 times ban athlete?

MiSH: Believe me pundits, if the audience knew the other drug cheats, they'd get exactly the same treatment.

Ian Reed: Right, can we put this whole Gatlin thing to bed now. It's done, over. Please can we get back to the sport and stop squabbling

Image source, Getty Images

Anyway Holly Bradshaw is back and ranked fifth in the world this year after breaking her own outdoor British record twice already in 2017.

She finished fifth in Rio last year, but she feels confident of punching above par and the bar after qualifying with a leap of 4.50m.

“I’m jumping really well, I feel physically so fit and so strong and powerful," she said.

“It’s good that I only had to do one jump in qualifying, I can save it now for the final.

“I’m feeling really confident, and like nothing can faze me. There are some really good girls who have made the final, so it’s going to be a good battle but I’m definitely going to be up there fighting for one of those medals."

Fighting talk.

Image source, Getty Images

How far have you gone to save the other half from a bad day?

Back at London 2012, Holly Bleasdale finished sixth in the pole vault final, saying she was "heartbroken with how it went".

Step forward then-boyfriend Paul Bradshaw, who consoles his partner, drops a knee and cracks out the bling.

"6th in the Olympics and @bradshaaaw proposes to me :) epic day!!!" tweets Bleasdale, a few hours later.

I'm not suggesting that cheering someone up is a good reason to propose, but it doesn't half do the job.

Usain Bolt pulls his trademark pose once again.

Probably best that he retires now before he is forced out of the sport by an RSI in his elbows.

Image source, BBC Sport

Richard: There hasn't been a more obvious villain since Darth Vader.

Darren York: Can you please change the conversation and talk about why the slow 100m times? 9:92 to win gold? Really?