Video: Allyson Felix clocks season best in 400m semi, makes final

Allyson Felix, of United States races in a women's 400-meter heat at the 2020 Summer Olympics, Tuesday, Aug. 3, 2021, in Tokyo, Japan. (AP Photo/Martin Meissner)
Allyson Felix, of United States races in a women's 400-meter heat at the 2020 Summer Olympics, Tuesday, Aug. 3, 2021, in Tokyo, Japan. (AP Photo/Martin Meissner) (Copyright 2021 The Associated Press. All rights reserved)

Jamaica’s Stephenie Ann McPherson ran a personal-best 49.34 to win the third semi of the women’s 400m, finishing as the round’s top qualifier into the final; Allyson Felix took second in a season-best 49.89, advancing.