All the expected finalists qualified. The structure of the semis didn't make it easy. The third semi was loaded with the defending champion,
Shericka Jackson, the newly crowned 100 metres champion,
Sha'Carri Richardson, and perennial finalist, 2017 silver medalist
Marie-Josée Ta Lou. With only two automatic qualifying spots, something had to give. Ta Lou had to get one of the time qualifying spots and was relegated to lane 2 in the final. In the final, the staggers mostly held true halfway through the turn, then Jackson began to edge forward with
Dina Asher-Smith and
Gabrielle Thomas showing a slight advantage. As they reached the straightaway, Jackson had a clear 2 metre lead with Thomas just barely ahead of Richardson, Asher-Smith,
Julien Alfred and
Daryll Neita. Jackson continued to power away, the winner was not going to be in doubt. Thomas separated, with Richardson also moving forward. Jackson let off the gas a couple of steps before the finish line, her time of 21.41 improved her standing as #2 performer of all time, just .07 short of
Florence Griffith-Joyner's 35 year old world record. Thomas followed 4 metres later, a step ahead of now double medalist at these championships, Richardson. ==Records==