France's Tessa Worley, the reigning world giant slalom champion, has been ruled out of the Winter Olympics next February after a fall during the World Cup slalom race at Courchevel on Tuesday.
Worley suffered a ruptured anterior cruciate ligament in her right knee, French Ski Federation (FFS) national technical director Fabien Saguez said.
Worley got into trouble at the top of the slope during the first run and crashed into an advertising billboard.
She was taken to hospital in Lyon for tests which later confirmed the cruciate ligament damage.
The 24-year-old won the women's World Cup giant slalom at St-Moritz on Sunday for her eighth career victory.
It was a first win for a French skier this season and came as something of a surprise as she had been struggling for form.
It was her first World Cup win since the giant slalom at Soldeu in Andorra in February 2012, although she did win the world title this year.
Her injury is another blow for the French women's skiing team after world downhill champion Marion Rolland was ruled out of the Sochi Games after injuring her right knee training in Chile in September.