Greg Rutherford wins long jump gold (8.41m)
David Rudisha wins 800m gold in 1:45.84
Genzebe Dibaba wins 1500m final
Christine Ohuruogu wins her 400m semi
Bolt and Gatlin win their 200m heats
Michael Johnson
BBC Sport athletics expert & 400m world record holder
Quote MessageAllyson Felix looks good and has a great style. I didn't like the execution of her race though. It was the fastest time of the season for Allyson - she has maintained that status as the favourite for the title.
Allyson Felix makes running a lap in 49.89 look easy and the American makes a statement of sorts to Christine Ohuruogu and Shaunae Miller. Anything you can do, I can do quicker...
Second was Jamaica's Shericka Jackson (50.03). It was a fine performance from Anyika Onuoro, finishing fifth in a personal best 50.87.
Image source, AFPThere's more to come in the 400m and there's another British athlete in action in the form of Anyika Onuora ,who will run from lane one.
Outside of her is Allyson Felix, who is aiming for a ninth World Championship gold. It's a tough challenge for Onuora.
Briton Christine Ohuruogu, who qualified for the 400m final by winning her semi-final, talking to BBC Sport:
"I was just doing my job. I haven't had time to process the race; it was nice to come back with a win and I did. This win was for me, it's part of my planning and preparation for the final. Knowing how to win helps but nothing is ever given. I just treat each round as it comes."
Allison Curbishley
BBC athletics expert on Radio 5 live
Quote MessageWe can never rule this lady out. She's a legend of the sport. That was so well measured. She attacked into the bend and knew the importance of winning her heat so she will be drawn in one of the central lanes. Bring on the final.
Michael Johnson
BBC Sport athletics expert & 400m world record holder
Quote MessageThat's exactly what Christine needed. I expect the same race in the final - she will position herself with 150m to go. Her weapon is her strength and she knows how to use it.
Image source, PA
Steve Cram
BBC athletics commentator
Quote MessageShe saves her best every single time for the championships. That run will frighten everybody.
A hush in the Bird's Nest before the silence is broken by the starter's bang. Christine Ohuruogu positions herself nicely coming into the final bend, in third spot.
Will it be another late surge? She's second with 40m to go and pulls clear in the last 10m to win in a season's best 50.16. Wow.
The top two in each semi-final will qualify for the final and already through are Shaunae Miller (50.12) of the Bahamas and Jamaica's Christine Day (50.82) who finished first and second in the first semi-final respectively. Both cruised to the line.
Christine Ohuruogu standing behind her blocks, a nervous smile to the cameras before she is introduced to the crowd from lane seven. Can the Briton join Miller and Day, who sound like a British comedy double act.
Christine Ohuruogu says it’s nice to be back in a country she has competed in and on a track where she has won Olympic gold.
Image source, bbc
Image source, PAQuote MessageChristine always looks like Christine - she's not going to let you down. She had the slowest qualification time of any of the six heat winners, so she did all she had to do which is smart. If you look at Christine's medals, she rarely came in as the favourite. She knows she's not as fast as other runners but does have strength and is in position when someone falters
Michael Johnson on BBC Radio 5 live
It was two years ago that Christine Ohuruogu surged towards the finishing line and secured World Championship gold with another perfectly-timed dip.
She left it late. Very late. But she beat the then defending champion Amantle Montsho by four thousandth of a second to become the first British female to win two World Championship titles.
Ohuruogu is now the defending champion and in Monday's heats she looked like an athlete who was once again timing her form to perfection. The Briton goes in the second 400m semi-final at about 12:12 BST.
Image source, Getty ImagesAs is the way with a day of track and field, there's a schedule to be followed and here's what we have in store for us in the next 30 minutes or so:
Image source, BBC Sport
What was the most read athletics page on the BBC website yesterday? Shelly-Ann Fraser-Pryce's golden moment? Usain Bolt filming the crowd? No, it was the one with the medal table.
Now seems an appropriate time to show the popular chart and it's still an enjoyable glance for British fans with Britain third thanks to Mo Farah and Jessica Ennis-Hill's golds.
Greg Rutherford has appeared on the track and is making his way toward the sand pit. On the other side of the track is Shelly-Ann Fraser-Pryce who has just received her 100m gold medal. The green dreads remain, as do the flowers in the pocket rocket's hair, which is a relief.
What's it like working with Usain Bolt? Zharnel Hughes can help us with that one.
"Training with Bolt is very motivational,” he says. “When you see somebody like that and he’s world's fastest man it makes me, as a youngster still coming up, want to train even harder.
“He has just told me to go out there and have fun when I’m running. That’s all. Is Bolt beatable? Anybody is beatable if they have a bad day on the track.”
Image source, Getty Images
Image source, PAQuote MessageThis guy’s the real deal. He’s 19 and has a lot to improve on. There’s a bronze medal up for grabs and nothing is nailed on. If he gets a good start and confidence – anything is possible and the 200m is an open event.
British hurdler Dai Greene on BBC Radio 5 live
Men's 200m heats (12:30 BST)
Michael Johnson
BBC Sport athletics expert & 400m world record holder
"It’ll be interesting to see how Great Britain's Zharnel Hughes handles the championships and the rounds.
"He doesn’t seem as comfortable on the bends and doesn’t have the speed and endurance at the moment. He can improve on these things.
"We've seen he can run 20:05 seconds and has shown real potential. He has a bright future. These championships can be a real chance for him.
"He could make these improvements at these championships. I wouldn’t say GB record holder John Regis’ 19.87 seconds is under threat here, but maybe in the future."
Who is the next Usain Bolt? No-one? Britain's Zharnel Hughes is the great Jamaican's training partner, is a lofty 6ft 3in and has been described as the next Bolt.
The 20-year-old's tale is a compelling one. Born in Anguilla, a British overseas territory not recognised by the International Olympic Committee, he lives and trains in Jamaica, having won a scholarship to the High Performance Training Centre there three years ago.
But he will be running today in a British vest, having become eligible to compete for his adopted country in July and that is Britain's gain. So far he's won at the British Championships and two Diamond League races. What else can he achieve? How quick can he go?
Image source, BBC Sport