Injury has forced Olympic BMX silver medallist Sarah Walker out of this weekend's final UCI World Cup Supercross in California.
Walker injured her wrist after crashing in practice at the track near San Diego.
Walker's injury woes began when she dislocated her shoulder at the Supercross round in Norway last April, but recovered sufficiently to gain her outstanding Olympic success.
However as there was a high chance of the shoulder dislocating again, Walker had an operation late last year that sidelined her for five months.
In her final competition preparation for the UCI World Championships in Auckland, she was taken down in a race in the USA in June, where she suffered a minor fracture in her elbow.
She further injured the shoulder when she fell in practice on race day which ended her world championship dreams.
Walker had recovered fully and had trained well for the final World Cup until the spill in practice yesterday.
There are eight New Zealand men competing this weekend, led by world championship silver medallist Marc Willers.
