Eileen Gu triumphed in the women's event at Copper Mountain ©Getty Images

Reigning halfpipe world champion Eileen Gu triumphed at the International Ski Federation Freestyle World Cup in Copper Mountain as the build-up continues to Beijing 2022.

The Chinese-American skier will represent the host nation at the Winter Olympics and is expected to be one of the faces of the Games.

She placed second in qualification yesterday at the American resort but led the standings after the first round of the final by scoring 90.50 points.

The 18-year-old, a double X Games and Youth Olympic Games gold medallist, was unable to improve her score in the final two runs.

Gu faced an anxious wait after Canada’s Rachael Karker produced a stunning final run of the competition.

Karker narrowly finished behind Gu, with the judges' score of 90.00 enough for second place.

Estonia’s Kelly Sildaru, a former world champion, completed the podium places.

The 19-year-old finished with a score of 88.75.

Alex Ferreira, who is from Colorado, the state where Copper Mountain is located, won the men’s competition.

The Pyeongchang 2018 Winter Olympic silver medallist scored 93.50 in the first run of the event to win the World Cup event.

The top three after the first run proved the same at the end of the competition.

Nico Porteous, the Pyeongchang 2018 bronze medallist and current world champion, scored 92.25 in the opening run.

Canada’s Brendan Mackay placed third, with his second run scoring 91.50, a narrow 0.25 improvement from his first effort of the competition.