|World Athletics Championships|
|Venue: Beijing National Stadium, China Dates: 22-30 August|
|Coverage: Live on BBC TV, Red Button, Radio 5 live, online, mobiles, tablets and app. Click here for full details.|
Briton Dina Asher-Smith booked her place in Friday's 200m final with a stunning win in her semi-final.
The 19-year-old ran a personal best of 22.12 seconds to make it through as the fastest semi-finalist.
Her main rivals will be Jamaica's Elaine Thompson, who won her semi in 22.13, and Dutchwoman Dafne Schippers, who eased to 22.36 in her race.
"I'm a world champs finalist and it's more than I could have asked for," Asha-Smith told BBC Sport.
"I was really happy with the heat and I knew I had to go for it in the semi."
Asher-Smith's mark was only two one-hundredths of a second outside Kathy Cook's 31-year-old British record.
"I'm not thinking about that. It's all about places, not necessarily times," she added.
Asher-Smith's team-mates Bianca Williams, who finished sixth in her semi-final, and Margaret Adeoye, who was eighth in her race, failed to qualify for the final.
|Pundits on Asher-Smith|
|Former world champion Michael Johnson: "She handled herself like a veteran, not a 19-year-old. That was fantastic."|
|Two-time world champion Colin Jackson: "She is 19 but runs like she is full of experience. Dina has a beautiful, long, loping stride that's helped her pull away from the field."|
|Olympic gold medallist Darren Campbell: "Dina Asher-Smith is a special, special lady. She has just said to Schippers, 'I am here to challenge; I'm here to get a medal'."|
Oskan-Clarke impresses in 800m semis
Shelayna Oskan-Clarke won her semi-final in a personal best time of one minute 58.86 seconds to reach the 800m final.
"I'm so happy it seems to have come together at the right time. I feel like I've been capable of it for a while," said the 25-year-old.
Jenny Meadows (2:00.53) and Lynsey Sharp (1:59.33) failed to progress after finishing seventh and eighth in their semi-finals respectively.
"I didn't do myself justice," Meadows told the BBC. "I felt lacklustre and lethargic but had no reason to feel like that. I give myself a two or three out of 10. It's a season best, but not what I was looking for."
Lawrence Clarke was seventh in his 110m hurdles semi-final.