More Olympic misfortune for Brockhoff

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Australian Belle Brockhoff has been taken to hospital for x-rays after crashing heavily during the quarter-finals of the mixed snowboard cross teams event at the Beijing Olympics.

Brockhoff was complaining of neck soreness after the crash, which saw her taken down the mountain in a ski patrol bucket to be assessed.

She was then transported to hospital although the AOC said it was as a "precaution" and she appeared to not be seriously injured.

"She has complained of a sore neck so as a precaution they have taken her to hospital for imaging and we should know more in the next hour," an AOC spokesperson said.

Brockhoff was in a qualifying position in second when she got too much speed off a jump and clipped the board of the leader, American Lindsey Jacobellis, who won gold in the women's event.

"I just hope that Belle's OK," said her team partner Cameron Bolton.

"She went down hard and had some medical attention. Early indications are that she's OK and it's just precautionary so fingers crossed for Belle."

Fellow Australian Josie Baff also crashed out, ending hopes of a medal in the new addition to the Olympic program.

Both Australian pairings were drawn in the second of four quarter-finals and male boarders Bolton and Adam Lambert successfully navigated the opening leg.

But with snow falling at Genting Snow Park, the luckless Brockhoff and Baff both failed to finish the second leg, ensuring that the United States and Switzerland claimed the top two positions.

Five-time Olympian Jacobellis, 36, and her partner Nick Baumgartner who is 40, went on to win the final from Italy with Canada taking bronze.

Brockhoff and Bolton were Australia's top-seeded pair, with Baff and Lambert only being added to the field on Friday night following the late withdrawal of a team from the Czech Republic.

Australia went into the event confident as reigning world champions, with Brockhoff and Jarryd Hughes winning the mixed team world title in Sweden last year.

However Bolton was preferred over PyeongChang silver medallist Hughes, who struggled in the men's individual race.

Bolton said they felt positive about their chances of winning Australia's first snowboard cross medal of the Games.

"Belle and I were super confident about our chances coming in to this," said fellow triple Olympian Bolton.

"I've been feeling comfortable all season and riding well and Belle has been such an incredible rider all year.

She's so strong here on this course. We were in a good headspace and we came into today really confident but unfortunately it's not the way it went.

"Either of our teams could have gone a long way today so it's heart-breaking for Australian boardercross."