Olympic downhill skiing champion Lindsey Vonn isn't sure if she'll recover from injury in time for the Sochi Winter Olympics in February.
The 29-year-old American was sidelined for seven months after rupturing cruciate knee ligaments in February.
Last week in training she partially tore ligaments in the same right knee.
Vonn says all going well she'll be back in action next week, if not she'll have to reassess her whole season.
Vonn, who also won downhill and Super-G gold at the 2009 World Championships in Val d'Isere, recorded her fifth consecutive women's World Cup downhill title last year.
Her latest injury occurred in a downhill training fall at the US Ski Team Speed Centre at Copper Mountain, with the partial tear in the anterior cruciate ligament and a mild strain to the same knee.
