American Tori Bowie upset Jamaican favorite Elaine Thompson to win world 100 meters on Sunday, as New Zealander Tomas Walsh dominated the shot put with a stunning series of throws.
The 26-year-old made up metres on long time leader Marie-Josee Ta Lou of the Ivory Coast to edge her with the final dip on the line.
Dutch 200m world champion Dafne Schippers got bronze in 10.96.
"It's really incredible, I'm very happy", said Thiam, who trailed in a distant last in the seventh and final event, the 800m, and was made to wait for confirmation of her victory. "Ta Lou went away fast but she always does".
"The dive doesn't feel too good now", said USA champion Bowie. "Am I really the world champion?"
Thompson does not even have the consolation of the 200m to aim for, her bemusement afterwards shared by the thousands of Jamaican supporters in the stadium who had come expecting a measure of payback for Bolt's great disappointment.
The pre-race favourite Thompson had to settle for fifth in 10.98 as Jamaica came up empty-handed.
South Africa's Wayde van Niekerk will also be in action on Day 3 of the World Athletics Championships and his performance will be looked keenly to see if he can indeed fill Usain Bolt's big shoes.
Bowie's final lunge at the line proved to be the difference, the American falling to the floor as she strained to cross first.
The dramatic fall is one that never fails to captivate an audience, however the dive comes with one important lessons: always lean in to the finish line.
Thompson said: 'I don't know what happened. "I just wanted to get a good start but they race well", she said.
"I didn't execute my race which is a shame but I am healthy", Thompson, who landed a 100 and 200 golden double in Rio past year.