Nairobi — Defending champion Hyvin Kiyeng easily sailed through to Friday's final of the women's 3000m steeplechase as she seeks to defend the title at the London IAAF World Championships.
Kiyeng, who led compatriots commonwealth champion, Purity Cherotich, Beatrice Chepkoech and World Cross Country bronze medallist Celliphine Chepsol, will be aiming to become the first woman to defend the world title.
With the top three to cross the line automatically qualifying to the final, Kiyeng advanced through from the first semi-final, crossing second in 9:38.86 behind winner Esa Felicitas Krause who timed 9:39.86.
Cherotich grabbed the last automatic slot in that semi after finishing third in 9:40.53.
Chepkoech was the fastest qualifier, clocking 9:19.03 to earn a marginal win over the world record holder and Olympic champion Ruth Jebet of Bahrain, who recorded 9:19.52.
Kenya's 18-year-old prodigy Chespol, who set a world U20 record of 8:58.78 in winning at the IAAF Diamond League meeting in Eugene, won her heat in 9:27.35, just ahead of the US bronze medallist from Rio, Emma Coburn, who clocked 9:27.42.
Kiyeng was happy to go along with a sedate early pace in the opening heat. The runners went through 1000m in 3:18.99 - barely inside 10 minute pace. The same applied at 2km, which the field, led by Morocco's Fadwa Madane, passed in 6:35.
The race proper began at the bell as Kiyeng and Assefa moved up. The final water jump saw Madane leading, but she was passed in the final straight by four - Krause, Kiyeng, Colleen Quigley of the United States, who recorded 9:40.07 but was subsequently disqualified, and Kenya's 2014 Commonwealth champion Purity Kirui, who took the third automatic qualifying spot in 9:40.53.
Neither Madane and Assefa made the final cut, paying for the slow opening speed.
By contrast, the second of the three heats was a more brisk - if equally wet - affair, as Chepkoech began swiftly, breaking away from all but the diminutive figure of Bahrain's former Kenyan, Jebet, whom she beat in their last meeting at the IAAF Diamond League meeting in Paris.
On that occasion Jebet was in the same position, on Chepkoechs's shoulder, when she came to grief at the water jump with just over three laps to go. There were no such slips here.
Their 2km time was 6:08, and there was - not surprisingly - a significant gap to the nearest chaser, Courtney Frerichs of the United States.
Both leaders had a look over their shoulder after negotiating the water jump for the last time and moved smoothly home, with Frerichs making certain of progression in 9:25.14.
The field for the third semi-final, stood shivering in driving rain and looked grateful to move into action.
At the bell, Chespol led from Coburn, with third place being disputed by Genevieve Lacaze of Australia and Winfred Yavi, another Bahrain runner who, slight and with cropped hair, looked uncannily like her team-mate Jebet.
Lacaze won the third definite spot in 9:27.53, but Yavi progressed anyway after clocking 9:28.00.