Athing Mu has won the 800-meter gold medal for the United States in her first Olympics after leading almost from start to finish.
Mu was never seriously challenged down the homestretch as she strode away to win in 1 minute, 55.21 seconds.
Britain's Keely Hodgkinson won the silver medal in 1:55.88, and Raevyn Rogers came from nowhere to clinch the bronze on the finish line and give the Americans a double celebration at the Olympic Stadium in Tokyo.
The result confirms the 19-year-old Mu as the new star of the women's 800.