Postpublished at 18:48 British Summer Time 10 August 2017
Women's 5,000m heats
Laura Muir is finally up on her feet. She's bleeding a bit from a spike mark. She can barely get up the stairs though. A very, very tough last lap or so.
Turkey's Ramil Guliyev wins shock 200m gold
Wayde van Niekerk takes silver & Jereem Richards bronze
GB's Mitchell-Blake fourth but Isaac Makwala comes sixth
USA's Christian Taylor wins triple jump gold
USA's Carter wins 400m hurdles; Eilidh Doyle eighth
GB's Asher-Smith qualifies for 200m final
Lake & Johnson-Thompson make high jump final
Muir & McColgan through to 5,000m final - Muir as fastest loser
Tom Rostance
Women's 5,000m heats
Laura Muir is finally up on her feet. She's bleeding a bit from a spike mark. She can barely get up the stairs though. A very, very tough last lap or so.
Women's 5,000m heats
Brendan Foster
Olympic medallist and BBC commentator on BBC Two
I have never seen her this distressed during or after a race before.
I am not sure she will want to run the final now. She is really having trouble getting onto her feet.
Women's 5,000m heats
Hellen Obiri won that heat in 14:56.70. Also through are Almaz Ayana, Senbere Teferi, Susan Krumins and Shannon Rowbury.
Women's 5,000m heats
Laura Muir clocks 14:59 and collapses to the floor as she crosses the line, in seventh place. She looked absolutely spent in that last lap.
She will have to wait and see if that is good enough to reach the final.
Women's 5,000m heats
Laura Muir is going backwards...
Women's 5,000m heats
Laura Muir working really hard down the back straight. In fifth but under pressure...
Brendan Foster
Olympic medallist and BBC commentator on BBC Two
For a very inexperienced 5,000m runner, Laura Muir has run a very good run so far.
She should have some speed at the end.
Women's 5,000m heats
The pace comes up. Hellen Obiri and Almaz Ayana kick on as we hit the bell! Laura Muir in fifth. That would be good enough. Big 400m to go.
Women's 5,000m heats
Don't forget that the first five in the heat are through automatically. Laura Muir is about sixth with two laps to go, but it's all one big pack still.
Women's 5,000m heats
Hellen Obiri and Almaz Ayana are camped at the front. Ready to kick if they need to. One kilometre to go.
Tom Fordyce
Chief sports writer at London Stadium
Much more like an August evening here tonight after the chill deluge of Wednesday, when those who had come dressed for summer left looking for soup and blankets.
Women's 5,000m heats
Plenty of pushing and shoving in the pack now. This could get tense. We have three laps to go, Laura Muir getting dropped back a touch.
Women's 5,000m heats
Brendan Foster
Olympic medallist and BBC commentator on BBC Two
No need to do anything at all apart from track Ayana. That is good enough.
The world champion is right next to Muir. She should take comfort from that.
Women's 5,000m heats
A little bit of pushing and jostling as Hellen Obiri moves to the front. The pace is slowing so Obiri picks it up. Almaz Ayana now steps across to take the lead with 1600m to go.
Women's 5,000m heats
Laura Muir still in the top six or seven, but it's all one big group. No worries so far. It's 73-second lap pace so far, steadyish. We are at the halfway point.
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Not sure this is particularly advisable...
Women's 5,000m heats
Steve Cram
BBC athletics commentator on BBC TV
The only time Laura Muir needs to be in the top three or four, is in the last two laps. That's when she needs to make a move. No point in wasting energy before that.
Women's 5,000m heats
Laura Muir has not run a 5,000m outdoors this season, with a PB in this event of 14:49.12. Also indoors.
A bit of context on time, not that that matters in the heats, is that Hellen Obiri of Kenya has run a 14:18 this year. Almaz Ayana has a PB of 14:12:59...
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