17th IAAF World Athletics Championships Doha 2019 - Day Three
DOHA, QATAR - SEPTEMBER 29: Allyson Felix of the United States competes in the 4x400 Metres Mixed Relay during day three of 17th IAAF World Athletics Championships Doha 2019 at Khalifa International Stadium on September 29, 2019 in Doha, Qatar. (Photo by Maja Hitij/Getty Images)