Image source, Reuters

The second 100m heat features Yohan Blake - the 2011 world champion and the second fastest man in the world this year.

Teenage Japanese wonderkid Abdul Hakim Sani Brown also features.

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

You've got to demonstrate to others around you that you're in great shape whatever the others throw at you and that was nice and solid for Christian Coleman.

Image source, Getty Images

Laura Weightman was part of the Rio 2016 final and she never looked like falling short of the worlds equivalent.

Stu rt H rley: Congratulations Sarah McDonald on qualifying, love the reaction on hearing the news.

Darren Campbell
Former British sprinter on BBC Radio 5 live

Image source, Reuters

Very, very impressive I've only seen this young man run on the internet. His start was excellent. That is one thing that could upset Usain Bolt, who doesn't tend to start well. He's very consistent and does a lot of damage in the first 30 metres. Once he got into it he got to that next level of total relaxation. He's definitely a threat.

Listen to Darren and the 5 live team - click 'BBC Coverage'.

Nice. Real nice.

American Christian Coleman out in an unfamiliar lane nine, stretches out, eases off and still stops the clock just a shade over 10 seconds.

Not too bad at all.

Right then, a first look at the fastest man in the world this year. University of Tennessee student Christian Coleman has a 9.82 second run in his back pocket.

Will the 21-year-old's form survive the transatlantic trip?

Also up in the first heat is Cejhae Greene of Antigua...

Buckle up... First three through automatically.

Running from the front, running hard.

Jess Judd, the first Briton to compete in London 2017, secures her semi-final place with a gutsy time-trial of a run.

Laura Weightman tells BBC Sport she cannot wait for Saturday's semi-finals.

"I love racing in this stadium. I thought for a heat it was relaxed and controlled," she adds. "I was aware all the time what was happening. Tomorrow is going to be extremely tough. It's a high quality event. I'm ready for it though and let's see what I have got."

Laura Muir played it canny in her heat...here's what she had to say.

Image source, EPA

Heat one of the 100m at 20:20 BST features Christian Coleman - the young American who can boast being the fastest man on earth this year - while Jamaica's 2011 World Champion Yohan Blake goes eight minutes later in heat two.

Great Britain's first 100m man on show tonight is Reece Prescod in heat three and he will have it tough against South Africa's Akani Simbine. Simbine has run under 10 seconds on eight occasions this season. For perspective, Usain Bolt has managed that once.

CJ Ujah (pictured), possibly Britain's best hope on form, runs at 20:44 BST and will fancy his chances as only American Christian Belcher in his heat has run quicker this year.

Then it's Justin Gatlin at 20:52 in heat five moments before Usain Bolt goes against James Dasaolu in heat six. Once again, three go through from each heat and six fastest losers. So 48 runners will be cut to 24.

Sarah McDonald has just been informed by BBC Sport she is through to the semi-finals as a fastest loser.

"No. Really? The noise was incredible and I'm so happy I'm through," she says. "I can't quite believe it yet. I knew it was a tough ask because it is my first World Championships."

A clean sweep for Great Britain!

Sarah McDonald - in her first senior championships - nicks the last spot as a fastest loser with a personal best time of 4:05.48.

All four are into the semi-finals tomorrow.

Neil Black spoke about making home advantage count.

Image source, PA

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

Laura Weightman should have a smile on her face because she ran well. She did just what was needed and nothing more.

Faith Kipyegon trots through to take the heat with room to spare.

Germany's Konstanze Klosterhalfen actually was going backwards in the final 100m. Maybe a little overcooked and overpsyched for a head.

Laura Weightman by contrast came on strong.

All three safely through.

Germany's Konstanze Klosterhalfen leads the Olympic champion Faith Kipyegon at the bell. Laura Weightman is back in fifth but looking steady.

Image source, PA

Laura Weightman of Great Britain is up in the third heat, with the German sensation Konstanze Klosterhalfen just in range after a couple of laps.

One minute six seconds through the first 800m.

Michael Johnson picks his top five World Championships moments - at number one is Usain Bolt's record-breaking 100m victory in 2009 in Berlin.

Job done for the South African Luvo Manyonga.

He is booked in for tomorrow's final with his very first jump in the long jump.

James Stevenson: Muir looked comfortable. Plenty still in the tank. Think she's going to need it