At the Japan National Stadium in Tokyo on Wednesday, Portugal's Isaac Nader produced the biggest upset of the World Championships, kicking to victory in 3:34.10 ahead of Britain's Jake Wightman (3:34.12), with bronze going to Kenya's Reynold Cheruiyot (3:34.25). Coscoran, following a race where he struggled to land a blow against the world's best, hit the line in 3:35.87, knowing it could have been much more, hoping and believing that one day it would be.
Healy threw herself into contention for a top-eight finish as the field of 14 set off at a decent tempo, with Kipyegon towing them through 400m in 63.96 and 800m in 2:07.27. The Dubliner settled in the middle of the pack and had moved up to seventh at one point, but didn't quite have the strength to hold on to it.
Right now, her best is the 3:57.15 she ran to finish runner-up in Paris last month, one of four top-three finishes she secured across the Diamond League season. But at the final in Zurich on Thursday, she would love to add a fifth and to edge closer to Ciara Mageean's Irish record of 3:55.87. Conditions are unlikely to comply, with cool weather and heavy rain forecast, but Healy comes into it after a lifetime best over 800m in London last weekend, clocking 2:00.19.
Faith Kipyegon bounced back from a disappointing mile race to shatter her 1500m world record, finishing in 3 minutes 48.68 seconds, breaking her previous record by 0.36 seconds.