Tokyo Olympics: Heartbreak for Kiwi triathlete Ainsley Thorpe, race ended by falling off bike

Kiwi Ainsley Thorpe suffered a heartbreaking end to the Tokyo Olympics triathlon, forced to retire hurt after falling during the bike leg.

Finishing the swim leg of the race in 15th place with a time of 19m 15s, 23-year-old Thorpe's race came to a cruel end, as the greasy conditions on the Tokyo streets saw her fall from her bike.

Persistent rain saw the start of the race delayed by 15 minutes to 6:45am local time, before turning the bike leg into a treacherous affair as several riders struggled to adapt to the greasy conditions.

Thorpe wasn't the only competitor to have her race ended by a fall though, with seven riders forced to retire hurt after falling during the bike leg.

Bermuda's Flora Duffy created history, winning the triathlon and delivering her nation's first Olympic gold medal - and only its second medal ever.

Duffy finished with a time of 1h 55m 36s, followed by Great Britain's Georgia Taylor-Brown in second, with USA's Katie Zaferes taking home bronze.

Thorpe's Kiwi compatriot Nicole van der Kaay crossed the line in 2h 4m 10s, taking out 29th place, more than eight and a half minutes behind the winner.