CHICAGO, IL - OCTOBER 08: Tirunesh Dibaba of Ethiopia wins the women's race with a time of 2:18:31 during the Bank of America Chicago Marathon on October 8, 2017 in Chicago, Illinois. (Photo by Dylan Buell/Getty Images)
CHICAGO, IL - OCTOBER 08: Tirunesh Dibaba of Ethiopia wins the women's race with a time of 2:18:31 during the Bank of America Chicago Marathon on October 8, 2017 in Chicago, Illinois. (Photo by Dylan Buell/Getty Images)