The Bermudan was victorious in the new super-sprint format, in which 30 athletes qualified for today's and final and then took part in three separate triathlon races, with 10 athletes eliminated from each of the first two and the remaining 10 battling for medals in the third.

Duffy was eighth in race one, sixth in race two, but turned it on when it mattered, coming home to win in 23min 7sec.

Taylor Knibb was seven seconds behind and Taylor Spivey a further 10 back as Americans completed the podium.

The course consisted of a 300-metre swim, 7.2-kilometre bike ride and 2km run.

France dominated the men's contest and locked out the podium.

Dorian Coninx pipped Vincent Luis to the line by just a second, with the winning time 22:08.

Léo Bergere was only three seconds off the victor's pace in third.

New Zealander Hayden Wilde - an individual bronze medallist at the Olympics - placed sixth.

Coninx and Luis were both members of the bronze medal-winning French mixed relay team at Tokyo 2020.