Laura Muir fell agonisingly short of a medal in the 1,500m at the World Championships in London after finishing fourth in a thrilling sprint finish.
The 24-year-old could not hold on in the final 100m and missed out on a podium place by seven hundredths of a second as Caster Semenya pipped her to bronze
Olympic champion Faith Kipyegon took gold in a time of four minutes 2.59 seconds, with America's Jenny Simpson clinching silver in 4:02.76. Muir came home in 4:02.97.
Muir was seventh in the 1,500m at the Rio Olympics last year and was in third place just behind the leaders with 200m to go but faded to finish well behind Kenya's Kipyegon.
"I gave it everything I could," said Muir. "I tied up in the last 15 yards. I gave it everything, considering the disruption I've had this year. I knew it was close. It happened so late in the race. I couldn't react, I was so tired."
Meanwhile, tearful Sophie Hitchon admits she blew her big chance after her hammer failure.
The 26-year-old, who won bronze at Rio 2016, could only finish seventh yesterday.
It left her in tears on the field after she was expected to challenge for a medal on another sobering night for British hopes.
Hitchon threw 72.32m but was over five metres behind winner, Poland's Anita Wlodarczyk, and admitted she should have done better. She said: "I felt like I was in better shape and if I had the rhythm I had in qualification, you don't know what could have happened. Of course I am (going to beat myself up about the result). That's part of my personality, maybe it comes out in me a little more and some athletes do better to hide it but I'm just really disappointed.
"I showed in qualification I was in better shape. It wasn't what I wanted, I'm sorry I couldn't produce better."
But there was success for Britain's 200m sprint trio as Danny Talbot, Zharnel Hughes and Nethaneel Mitchell-Blake reached tomorrow's semi-finals.
Talbot ran a personal best of 20.16s, level with Olympic champion Wayde van Niekerk in the third heat - although Van Niekerk slowed in the final 20m.
British Athletics captain Eilidh Doyle qualified for the 400m hurdles semi-final along with Meghan Beesley, but Jess Turner missed out.
Nathan Fox failed to reach the men's triple jump final with a best leap of 16.49m, well below the 17m qualifying mark, while Jack Green did not progress past the 800m semi-final. Zoey Clark also bowed out at the semi-final stage in the women's 400m.
Ireland's Thomas Barr pulled out of last night's 400m hurdles semi-finals due to a vomiting bug.
Jamaica's Omar Mcleod, meanwhile, won in the final of the men's 110m hurdles.