All the drama came late on at the Olympic Stadium.
Dina Asher-Smith, Team GB's poster girl of the Games, failed to make the 100m final, and then announced she would be withdrawing from the 200m because of a torn hamstring.
Her interview was heartbreaking.
Video content Video caption: Tokyo Olympics: Dina Asher-Smith reveals she tore her hamstring at British Olympic trials Tokyo Olympics: Dina Asher-Smith reveals she tore her hamstring at British Olympic trials
The 100m final, the blue riband event, took place later on with a stellar line-up, featuring GB's Daryll Neita.
Elaine Thompson-Herah won in a new Olympic record, defending her title from Rio 2016. Shelly-Ann Fraser-Pryce and Shericka Jackson completed a Jamaican one-two-three.