Laura Muir lost out on a medal chance in Rio by going hard early. She is right at the front from the start.

Laura Muir goes straight to the front, flanked by Jenny Simpson.

A huge cheer for Laura Muir and Laura Weightman as the crowd are introduced to the runners. A full house still despite the late start time.

And away we go!

BBC Radio 5 live

Image source, PA

Hannah England, 1500m silver medallist in 2011, tells BBC Radio 5 live: "At this moment you're thinking about your race plan. You're thinking about those chats with your coaches and how to execute them.

"The longer they leave this, the more it plays into Semenya's hands."

Steve Cram has heard that either Laura Muir is going to take the race on from the start or Sifan Hassan will go at 400m...

Time for Laura Muir and Laura Weightman to shine then. What a strong field this is. Sub four minutes?

The women in the 1500m final aren't waiting around. They don't pause in the fireworks and strike a pose - just nail it out onto the track.

It's great that Omar McLeod's Twitter name is 'Warrior_omz' yet he's soft enough to hug his "mummy" after winning gold.

Laura Muir is one of two Brits in the final with Laura Weightman. Muir finished second in a strong semi-final and said afterwards she had refused to panic. The double European indoor champion is attempting to win a first global medal having finished in seventh in the Olympic 1500m final last summer.

Rio champion and world silver medallist, Kenyan FaithKipyegon, won that semi-final and was fastest in qualifying with 4:03.54 minutes. Sifan Hassan, of the Netherlands, won her semi in 4:03.77 and the reigning world indoor champion remains undefeated in 2017 in the 1500m. Caster Semenya who despite a lack of races over 1500m in 2017 was fourth fastest in the semi-finals, and reigning world champion Genzebe Dibaba are all threats.

1. Hanna Klein (Ger)
2. Laura Weightman (GB)
3. Meraf Bahta (Swe)
4. Sifan Hassan (Ned)
5. Caster Semenya (SA)
6. Malika Akkaoui (Mor)
7. Laura Muir (GB)
8. Faith Chepngetich Kipyegon (Ken)
9. Rababe Arafi (Mor)
10. Genzebe Dibaba (Eth)
11. Jennifer Simpson (USA)
12. Angelika Cichocka (Pol)

Allison Curbishley
BBC athletics expert on Radio 5 live

You can't block things out and do your own thing in the 1500m. It's the one race that is so tactical and you have to be ready. That's why we love it because it's four minutes of madness.

Listen to Allison and the 5 live team. Click play at the top of this page.

Get out well, stay out front, see it home.

Laura Muir and Laura Weightman are 10 minutes away from their final. Such a high-class field, are we expecting a fast race? Or a tactical, chess game?

Kenya's Faith Kipyegon won Olympic gold in the women's 1500m final in Rio last year, where Laura Muir went all out for gold.

Many onlookers were of the opinion that she would have brought home a silver or bronze if she hadn't made a break for it - but that was her tactical move. I had a lot of time for it.

"I went for the win," said Muir at the time. "It's not every day you find yourself in an Olympic final. I was in great shape but the last 150 metres was not quite in me.

"I gave everything and I'm proud of how I ran."

Will she go all out again tonight?

Image source, Getty Images

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

What a run by Omar McLeod. He arrived here as a favourite, but when you've got 10 3ft 6in barriers then what pressure. McLeod used his leg speed so well.

Aries Merritt had to come through that transplant and missed so much training.

Yulimar Rojas has gone bigger! She leaps 14.91, so light across the ground. Effortless technique, like a pebble across the sea.

She leads by two centimetres...

Darren Campbell
Former British sprinter on BBC Radio 5 live

One of the problems in the past was the Jamaicans would go to college in America, end up making a home there and then run for the country where they are living. But now because there is a pathway for the Jamaicans to stay in Jamaica, train in Jamaica, inspire the next batch of kids, it's proved so important. Track & field has probably become the most powerful sport there.

Image source, Reuters

Omar McLeod was so clean and in control all the way through that race. Third to eighth, you could have thrown a blanket over them.