Kenya's Ruth Chepngetich has destroyed the opposition to win the women's Chicago Marathon while Ethiopia's Seifu Tura claimed victory in the men's race.
World champion Chepngetich went out fast in Sunday's race, securing a 27-second lead through the first 10 kilometres and never letting up to win in 2 hours 22 minutes 31 seconds, one minute and 49 seconds clear of second-placed American Emma Bates.
It was the first major title for Tura, who held off home hope, 2017 champion Galen Rupp, through the final stretch to finish 23 seconds ahead in 2:06:12.
Tura's compatriot Shifera Tamru got the men's race off to an aggressive start, leading by a 15-second margin through the first 15 kilometres but he faded to finish fifth.
The temperature hovered around 73 degrees Fahrenheit (22.8degC) when the elite field started, as the marathon returned this year after being cancelled in 2020 due to the COVID-19 pandemic.
It is part of a tight autumn racing schedule, with two other world marathon majors - in London and Boston - pushed back from their usual April dates to October 3 and October 11 respectively.
In the wheelchair events, American Daniel Romanchuk won the men's race for the third consecutive time after battling Paralympic champion Marcel Hug, breaking the tape in 1:29:07, while Tatyana McFadden, also of the US, won the women's race in 1:48:57.