Dina Asher-Smith's chances of World Championships gold continued to grow after a raft of rivals pulled out of the 200m - as Adam Gemili kept his medal hopes alive.
Four-time European champion Asher-Smith claimed 100m silver on Sunday in the first part of her treble medal bid and breezed into the 200m semi-finals on Monday.
Defending champion Dafne Schippers has withdrawn from the Championships with an adductor problem and the Ivory Coast's Marie-Josee Ta Lou, who won 100m bronze, is also out injured.
New 100m champion Shelly-Ann Fraser-Pryce will not run while Nigeria's Blessing Okagbare was disqualified for stepping out of her lane in heat five on Monday.
Asher-Smith broke her own 100m British record to set 10.83 seconds and win her first individual global medal in Doha but the 23-year-old insisted there was no release of pressure.
"I wouldn't call it a relief. I don't think about it like that, I'm not a negative person," said Asher-Smith, who ran 22.32 seconds in her 200m heat.
"I'm just proud of myself, I've definitely taken my time and worked my way up from being a relay runner and then through Beijing through London and the broken foot.
"It's just been a lot of hard work that I'm proud. We've got more goals to go through the week. I've never really got nervous, not since 2013 but I definitely get adrenaline which is good.
"That means it's all within my control. But no I wasn't nervous because I knew that I had it within me."
Beth Dobbin also reached the semi-finals after coming third in heat six in 23.14secs.
She added: "It's my first worlds. This time two years ago, if you'd said I was coming I'd have laughed in your face.
"It's a new experience for me. This is the longest I've ever been away from home. There are loads of first times.
"My coach isn't here which has been tough, as well as dealing with injuries. It's been tricky but I'm through to the semis."
In the men's 200m Gemili reached Tuesday night's final at the Khalifa International Stadium.
Gemili ran a season's best of 20.03s and said: "I am still not firing 100 per cent but I am getting there. I wanted to win that semi and get a good lane for the final.
"I've been saying it for years... Once you get in the final, anything can happen. It's a clean slate and people can make mistakes. For me, I am going to run to the best of my ability."
Zharnel Hughes failed to progress and Miguel Francis was forced to pull out after suffering a quad strain in Sunday's heats.
Hughes, who came sixth in the 100m final, added: "I try not to dwell too much in disappointment - as an athlete you will feel some over the years and it's hard.
"Sometimes it can be a heavy pill to swallow, but at the end of the day you have to recover yourself and try not to get too consumed in disappointment."
Laviai Nielsen reached the 400m semi-finals with a run of 51.52s but Emily Diamond missed out, while Andrew Pozzi also reached the 110m hurdles semi-finals in 13.53s.
Norway's Karsten Warholm took the 400m hurdle title but missed out on a world record. He ran 47.42s and beat Qatar's Abderrahman Samba into third with the USA's Rai Benjamin second.