Woof!

Woah that's a fast heat! Shelly-Ann Fraser-Pryce runs 10.80, the fourth-fastest time this year!

Shelly-Ann Fraser-Pryce in the first 100m heat. Two-time Olympic champ. Quality.

Saj Chowdhury
BBC Sport in Doha

Before we see Dina Asher-Smith in action here's what GB skipper Richard Kilty told me about the sprinter - he gave the impression of being a paid-up member of the 'Asher-Smith fan club'.

"I think she has the chance of winning two golds - I call her the fastest woman in the world," he said.

"I think she can take the individual titles at these championships. She's the hot favourite in the 200m."

Image source, Getty Images

The first action of the day, just under way, is the qualifiers for the men's discus. The 12 best go through to the final, or it's an automatic pass for anyone who can chuck it 65.5m. The length of a 747 wingspan...

Don't forget you can get in touch with us throughout the day using the usual channels...

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

Why are the championships here? There are so many hardships created by having them here. I am sure it was very expensive for teams to get here.

It begs the question: why? If the stadium is empty tonight for the men's 100m final - it's sad.

My dad used to go nuts if someone left a light on. Best not to think about the electricity bill here.

Who will be coming home with a lump of gold in their hand luggage?

Medals to be won tonight in:

Women's hammer

Men's long jump

Women's 10,000m

Men's 100m

Men's 50k walk

Women's 50k walk

Image source, Getty Images

World champion decathlete Kevin Mayer says holding the World Athletics Championships in Doha is a "disaster".

The championships started on Friday but 28 runners dropped out of the women's marathon because of 32C temperatures even though it was held at midnight.

Crowds in the Khalifa International Stadium have so far been sparse.

"We can all see it's a disaster, there is no-one in the stands, and the heat has not been adapted at all," the French world record holder, 27, said.

"There have already been nearly 30 withdrawals in the women's marathon. It's sad.

"We have to leave reason aside and more concentrate on the passion, because if not I would have boycotted these championships.

"We haven't really prioritised athletes when organising the championships here. It makes it difficult."

Briton Dina Asher-Smith begins her bid to win three medals as she competes in the women's 100m heats (14:30). Imani-Lara Lansiquot, Daryll Neita and Asha Philip will also hope to progress to the semi-finals.

DAS actually runs at 14:51 - she's in heat four.

TV coverage: 14:15-16:30 - live coverage - BBC One; 16:30-20:30 - live coverage - BBC Two; 21:25-02:15 - 50K walk - BBC Red Button; 16:30-21:30 - uninterrupted coverage - Connected TV and online; 20:00-21:00 - BBC Radio 5 Live

Number of golds: Six to be won - women's hammer, men's long jump, women's 10,000m, men's 100m, men's 50km walk, women's 50km walk

Saj Chowdhury
BBC Sport in Doha

You probably by this stage have read about the events of a very hot and humid women's marathon which was raced around Doha's Corniche.

Now 28 of the 68 starters did not finish, which in itself isn't hugely unusual, but it seemed some were riled they had to race in those conditions.

Read the report here.

So I spoke with commentator Steve Cram today who said that we should also focus on those who actually did finish and coped with the conditions. They included pretty much the best marathon runners in the world including winner Ruth Chepngetich.

The IAAF has been contacted about whether it will have a rethink of its strategy regarding the walk events and men's marathon.

Image source, Getty Images

...and it's still hot in Doha.

The marathon runners are still cooling down from their midnight exhertions but it's time to go from the marathon to a sprint.

Image source, Getty Images

It's women's 100m time, heats in the heat.

And then tonight the men's 100m final. Showpiece.