Tori Bowie the favourite to progress, and that isn't because she's got an A-lister's name. The American reacts fabulously, stumbles slightly coming out of the blocks, though,  and doesn't relinquish the lead for the entirety of the race, clocking 10.87 to win. 

Trinidad and Tobago's Kelly-Ann Baptiste is also through, coming second in 10.90. 

Image source, Getty Images

Here's the line up for the second women's 100m semi-final. The semi-finalists being introduced to the crowd as I type so we will be under way shortly. 

Lanes two to nine:

Ramona Papaioannou (Cyp) SB 11.36secs

Viktoriya Zyabkina (Kaz) SB 11.20secs

Tori Bowie (USA) SB 10.81secs

Rosangela Santos (Bra) SB 11.04secs

Natasha Morrison (Jam) SB 11.03secs

Kelly-Ann Baptiste (Tri) SB 10.84secs

Mujinga Kambundji (Swi) SB 11.17secs

Chisato Fukushima (Jpn) SB 11.23secs

Michael Johnson
BBC Sport athletics expert & 400m world record holder

"Asha Philip got a good start, she always does, and put herself into a good position.

"One of the things I saw that I didn't like was that she started to lean backwards compared to the other athletes."

They step into the blocks, Briton Asha Philip takes a deep breath before crouching... the first two qualify automatically for the final...

Easy for Shelly-Ann Fraser-Pryce as she pumps the legs and overtakes her rivals from halfway to finish in 10.82 seconds. Joining her in the final will be Commonwealth champion Blessing Okagbare (10.89). 

Asha PhIilip started well but was out of contention by the closing stages, finishing seventh in 11.21 secs. 

Image source, PA

Lanes two to nine:

Asha Philip (GBR) SB 11.10secs

Yongli Wei (Chn) SB 11.28secs

Blessing Okagbare (Ngr) 10.80secs

Marie-Josee Ta Lou (Civ) 11.06secs

Shelly-Ann Fraser-Pryce (Jam) 10.74secs

Semoy Hackett (Tri) SB 11.16secs

English Gardner (USA) 10.79secs

Sherone Simpson (Jam) 10.95secs

Here are the acts lining up in the first semi-final, and if features the splendidly named English Gardner, perhaps she is the one who placed those flowers in Fraser-Pryce's hair. 

What's next? The women's 100m semi-finals and another Jamaican sprinting great, Shelly-Ann Fraser-Pryce is pacing near her lane, waiting to explode into action. 

The world and Olympic champion has been the the hairdresser for this championships and looks like a flower girl in technicolor - green dreads with sunflowers on her head. It grabs the attention. 

Jessica Ennis-Hill's coach Toni Minichello has been talking to BBC Sport. He says: "It was straight back to the hotel yesterday for packing as we are leaving today. Reggie has been waiting for his mum for the last two weeks so it's time to go home."

Describing the challenges he faced coaching Ennis-Hill after she gave birth 13 months ago, Minichiello added: "The running was superb from day one, the difficulty was doing stuff like jumping and bouncing.

"That was very difficult when we started and we had some Achilles issues to deal with as well. You learn as you are going along and do the best you can to make a compromise."

Jessica Ennis-Hill's coach Toni Minichiello is currently chatting to Gabby Logan on the telly, but earlier he was speaking to the good folk on BBC Radio 5 live.

"When she first came back to the sport it was very difficult with the power events and then we had injury issues, so it was slow progress, but when she got to the London Anniversary Games, it was there that we felt she should go," says Minichiello.

Michael Johnson
BBC Sport athletics expert & 400m world record holder

"Meghan went out really quickly and she would have to attack this and do the best she could. She is a slight athlete, very small, and lacking a bit of power that the other athletes have, but it was a valiant effort from her."

Is Meghan Beesley through to the 400m hurdles final as a fastest loser? Unfortunately not, her time of 55.41 not quite good enough, but Eilidh Child is through as a fastest loser.  

America's Shamier Little is also through as a fastest loser, and hopefully she will wear that eye-catching bow in her hair in the final. 

Ouch. Smash, bang, wallop. America's Kori Carter runs into a barrier and she's gone, gone gone. 

Meghan Beesley finishes third, with the world champ Zuzana Hejnova strolling over the line in first with Jamaica's Janieve Russell second. 

British eyes on Meghan Beesley in lane four as she prepares to run and hurdle in the final semi-final. The Briton ran a personal best 54.42 to qualify from the heats, but is up against world champion Zuzana Hejnova in this ding-dong. 

Child is downbeat, but there's still hope as she is currently the quickest loser with one more semi-final to come...

The great Kaliese Spencer controlling the race early on, but is passed by Denmark's Sara Slott Petersen (54.34) with 20m or so to go. What happened to Shamier Little? The American and her bow crossed the line in third in 54.86, an iffy hurdle coming out of the bend costly. 

It was a fairly slow race, which is good news for Eilidh Child, says Steve Cram in the commentary box. 

The second women's 400m hurdles semi-final is upon us and although there is no Briton racing that does not mean we're not interested, mainly because we want to see if Shamier Little's radioactive green bow stays on top of her head for the entire lap.

It's an incredible accessory to wear during the heat of battle, but why not add extra glamour to such occasions? 

Colin Jackson
Two-time world 110m hurdles champion

"Eilidh Child will be disappointed with that performance. She would have been looking at this list and thought she could make it through.

"But the problem was with hurdles six and seven and she took hurdle eight on her wrong leg. It was just off sync for her and it is back to the drawing board. But she could still get through as a fastest loser."

As the bookies' would have predicted, Eilidh Child, Cassandra Tate and Wenda Nel coming round the final bend together. Child slightly ahead... but she's overtaken by eventual winner Tate (54.33 seconds) and Nel, the Briton stuttering on the final couple of hurdles.  

Child (54.80 seconds) must now wait to find out if she is one of the two fastest losers. 

The first two in each semi-final will qualify, plus the two fastest losers. Should European champ Eilidh Child qualify, it would be her second successive final at the World Championships. 

On paper, the Scot is the third quickest this year of the line-up, behind America's Cassandra Tate and South Africa's Wenda Nel. 

For those of you who like graphics and a bit of detail on your schedule then this one's for you. Briton Eilidh Child (lane 5) is in the first 400m hurdles semi-final. The Scot sipping juice as she waits to be called into position. 

I guess we should focus on the day ahead. Five gold medals to be won, the fastest women on the planet on show - this is how it will all unfold: 

12:00 men's javelin throw (qualification, Group A) 

12:05 men's pole vault final

12:10 women's 400m hurdles semi-finals

12:30 women's triple jump final 

12:40 women's 100m semi-finals

1305: men's 400m semi-finals

13:35 women's 10,00m final

14:15 men's 3,000m steeplechase final

14:35 women's 100m final 

Check out our day-by-day guide for a comprehensive look at what's ahead the rest of the week. 

Image source, Getty Images