Great Britain’s Josh Kerr was made to settle for Olympic 1500m silver behind shock champion Cole Hocker, as Jakob Ingebrigtsen missed out on a medal.
As world gold medallist Kerr and defending Olympic champion Ingebrigtsen played out their anticipated battle for the title, American Hocker found his way past both on the inside to clinch his first global outdoor title.
With a perfectly timed final surge, Hocker took gold in an Olympic record three minutes 27.65 seconds.
Kerr, who upgraded his Olympic bronze from Tokyo, crossed the line in a British record 3:27.79 as another American athlete, Yared Nuguse, ran a personal best 3:27.80 for bronze.