Zoi Sadowski-Synnott is out of medal contention at the prestigious US snowboarding Open in Colorado.
The Winter Olympic bronze medallist has finished seventh in the semi-finals of the women's slopestyle, with only the top six progressing to Saturday's final.
Sadowski-Synnott was sitting third after her first run with a score of 70 point five, but failed to complete a clean second run and was overtaken by others.
It was her first meet since claiming bronze in the big air in Pyeongchang a fortnight ago and a day after turning 17.
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Fellow Pyeongchang Olympian Carlos Garcia Knight was set to compete in the men's slopestyle but withdrew due to an arm injury.