Australian track cyclist Matt Richardson has finished second and compatriot Matt Glaetzer is third in the keirin final behind Dutch great Harrie Lavreysen.
Richardson was unable to pass Lavreysen on the final straight after Glaetzer hit out first in the final, with the other three riders crashing on the last lap.
It is Richardson’s third medal at the Paris Olympics, after he also finished runner-up to Lavreysen in the sprint.
After a run of fourth-placed finishes at his previous three Olympics, Glaetzer has won an individual medal for the first time at his farewell Games. Glaetzer and Richardson also won bronze in the team sprint.
There was some drama after the final, with Malaysia’s Australian coach John Beasley arguing heatedly with officials. Malaysian rider Muhammad Sahrom, who was involved in the crash, was relegated to last place.
British rider Jack Carling and Japan’s Shinji Nakano did not finish as a result of the crash. Lavreysen swept the men’s sprint events, with the Netherlands also dominating the team sprint.
Richardson handed Lavreysen a rare loss when the Australian beat his Dutch rival in their semi-final. But Lavreysen was imperious in the final, taking the lead at the perfect moment and holding off Richardson at the finish.
He is the first rider to sweep the men’s sprint gold medals since British great Sir Chris Hoy in 2008.
Georgia Baker was also looking at a podium finish in the omnium, before her legs betrayed her in the last race and she faded to fifth, leaving her holding back tears after the near-miss.
“I’m pretty upset. I proud of how I rode … I gave it my all. But I’m still disappointed because my goal was get on the podium,” she said.
American Jennifer Valente successfully defended her Olympic omnium crown ahead of Poland’s Daria Pikulik and New Zealand’s Ally Wollaston.
Another New Zealander, Ellesse Andrews, backed up from her keirin win to take out the sprint gold medal ahead of Germany’s Lea Friedrich and Emma Finucane, of Great Britain.
That meant the Netherlands topped the track cycling golds with three, while the US and New Zealand won two apiece.
Australia were then among a spread of nations who won one apiece – a vast difference to Tokyo, when the British and Dutch dominated at the velodrome.