Postpublished at 14:53 British Summer Time 28 September 2019
Dina Asher-Smith won that heat by a long way.
Catch-up: Women's & men's 50km walk finals and day two highlights
US sprinter Christian Coleman wins men's 100m gold in 9.76 secs
Jamaican Tajay Gayle triumphs in men's long jump final
Dutch runner Sifan Hassan wins women's 10,000m; hammer gold for USA's DeAnna Price
GB's Dina Asher-Smith wins women's 100m heat
Use play icon to watch live coverage from Doha (UK only)
Tom Rostance and Luke Reddy
Dina Asher-Smith won that heat by a long way.
That was impressive! You have to say. Dina Asher-Smith powers away from the field to win in 10.96. An easy 10.96 as well.
Plenty more in the tank.
Here she goes...
Michael Johnson
Four-time Olympic gold medallist athlete on BBC TV
Dina will do whatever it was she had decided before this and stick with that. It's all just about the qualifying. it really doesn't matter what time you run, it's about getting to that next round.
Here comes DAS. Dina is the only athlete in heat four to run under 11 seconds this season. Looks relaxed.
You're not really supposed to run this quick in a heat. But we enjoyed it very much.
Elaine Thompson cruises to that win in 11.14 - Asha Philip is not in the top three and may be struggling. That was a 'slow' heat.
She's sixth in 11.35.
Neita through heat one
Daryll Neita, who comes second in her heat, tells BBC Sport: "I'm at the world championships, this is it. We have trained forever and it was about executing what I know I can do, remain calm. I'm just really happy now.
"It's just about remaining focused now to the next round."
Elaine Thompson, up next, is the reigning Olympic champion in 100m & 200m from Rio but she has yet to win an individual World Championship 100m medal (5th at London 2017).
Daryll Neita ran a PB actually - 11.12 seconds.
Saj Chowdhury
BBC Sport in Doha
So if you scroll back to the 14:11 BST entry you can see I had a chat with BBC commentator Steve Cram, and it was at THE coffee shop in Doha to be seen at during these championships, I think, because a few moments later Holly Bradshaw strolled past.
I asked the British pole vaulter - the morning after she qualified for Sunday's final - what she thought of conditions inside the stadium.
"It's cooler but still warm enough for me which is good because it'll hopefully help prevent me from picking up an injury," she said.
That's one way to look at it.
Asha Philip of GB in heat three, along with Elaine Thompson.
The Jamaican has scorched through 10.73 this season. Another fast time coming up?
'It's a quick track.'
Well run, Daryll Neita - she's through in second, comfortable.
Marie-Josee Ta Lou wins that heat in 10.85. They are on it today!
Daryll Neita has never broken 11 seconds. Can she make it through?
Colin Jackson
Two-time world 110m hurdles champion on BBC TV in Doha
I can assure you it is noisy down here. There's a buzz from that performance from Fraser-Pryce.
Dina-Asher Smith arrives in Doha under a great deal of expectation. Two gold medals maybe?
Here's her workload if she is to earn those precious bits of metal...
Women's 100m heats
Saj Chowdhury
BBC Sport in Doha
Yes, it's not a huge crowd but you could make out the gasps as Shelly-Ann Fraser-Pryce crossed the line in an incredible 10.80 seconds.
Talk about setting the standard - it's the fastest ever time in the women's 100m heats in championships history.
Daryll Neita of Great Britain goes in this next heat. She's got competition too, Marie-Josee Ta Lou is lightning.
The top three in each heat go through.
Dina Asher-Smith's PB is 10.85. For context.