Olympic downhill champion Lindsey Vonn is not certain she will recover from injury in time for the Winter Olympics, which begin in Sochi on 7 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.
"If things go well, I'll be racing next week," she said. "If they don't, I'm going to have to reassess and see if I can make a comeback for this 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.
"I'm feeling good from rehab," she said. "I feel stable. I put some weight on it yesterday doing some weighted balance exercises and doing some squats and things like that, and it felt really good, so I'm very hopeful, but, I really don't know until I get on snow.
"There definitely is a long ways to go there, but I'm confident that it's going to be OK. At this point, that's all I can do - stay positive. I'm kind of out of options at this point."