Allyson Felix calls time on her athletics career

EUGENE, OREGON - JULY 15: Allyson Felix of Team United States reacts after winning bronze in the 4x400m Mixed Relay Final on day one of the World Athletics Championships Oregon22 at Hayward Field on July 15, 2022 in Eugene, Oregon. (Photo by Steph Chambers/Getty Images)

EUGENE, OREGON - JULY 15: Bronze medalist Allyson Felix of Team United States looks on following the medal ceremony for the 4x400m Mixed Relay Final on day one of the World Athletics Championships Oregon22 at Hayward Field on July 15, 2022 in Eugene, Oregon. (Photo by Ezra Shaw/Getty Images)

EUGENE, OREGON - JULY 15: Allyson Felix of Team United States reacts after winning bronze in the 4x400m Mixed Relay Final on day one of the World Athletics Championships Oregon22 at Hayward Field on July 15, 2022 in Eugene, Oregon. (Photo by Steph Chambers/Getty Images)

EUGENE, OREGON - JULY 15: Bronze medalist Allyson Felix of Team United States with her daughter Camryn after winning bronze in the 4x400m Mixed Relay Final on day one of the World Athletics Championships Oregon22 at Hayward Field on July 15, 2022 in Eugene, Oregon. (Photo by Steph Chambers/Getty Images)

EUGENE, OREGON - JULY 15: Allyson Felix of Team United States competes in the 4x400m Mixed Relay Final on day one of the World Athletics Championships Oregon22 at Hayward Field on July 15, 2022 in Eugene, Oregon. (Photo by Patrick Smith/Getty Images)