Sarah Teelow, 20, came off her skis shortly after the start of the Bridge to Bridge Water Ski Classic near Sydney on Sunday.
She suffered serious spinal and head injuries and later died in hospital.
Sarah Teelow won the Formula 2 category at the World Waterski Racing Championships in Spain in September.
Ski Racing Australia described her as “one of the sport’s most accomplished young competitors”.
“The ski racing fraternity is deeply saddened by Sarah’s passing and extends its condolences to her family,” it said in a statement.
Sarah Teelow, from Wellington, was the daughter of two-time world water-ski champion Tania Teelow.
Local media say New South Wales police are investigating how Sarah Teelow came off her skis.
Skiers can reach speeds of more than 80 mph in the 70 miles Bridge to Bridge course.
mva0padloF0Three Indian nationals have been arrested and charged over the killing of Sikh separatist leader…
President Joe Biden has urged pro-Palestinian protesters on university campuses to uphold the rule of…
Blue Ivy Carter has joined the voice cast of The Lion King prequel Mufasa: The…
At least five people, including a four-month-old baby, have been killed after dozens of tornadoes…
Harvey Weinstein has been hospitalized just days after his 2020 rape conviction in New York…
Hamas has published a video showing the first proof of life of US and Israeli…