Great Britain's Tiffany Porter broke down in tears after finishing last in her semi-final of the 100m hurdles at the Aviva London Grand Prix in Crystal Palace.
Porter has been carrying a back injury and looked in pain as she slowed down from the seventh hurdle onwards before finishing in 14.19 seconds, more than 1.5s behind winner Virginia Crawford.
American Danielle Carruthers, who finished third, comforted Porter on the track and said: "She's a little dinged up and she is a little worried because the pressure of competing well and getting a medal in your home town is big."
She added: "I know how that feels to have a lot of pressure on you and I just wanted to let her know that even though things are hurting on you, you have a chance, your body is hurting but it doesn't mean you can't run fast.
"It's hard to get past it when you have some pain but last year at the World Championships my Achilles was hurting me bad, a week before I was crying just like her thinking I was out of it, but we taped me up, had acupuncture, pieced me together and I got a medal."
With Robbie Grabarz only finishing joint second alongside Tom Parsons in the high jump with a best of 2.22m, there was at least some good news in the women's javelin as Goldie Sayers improved her own British record.
Sayers threw 66.17m in the first round to better her previous best of 65.75m, which was set when finishing fourth in the Beijing Olympics in 2008.