France Alpine Skiing World Cup

France's Marion Rolland speeds down the course during a 2012-13 World Cup race. (Marco Trovati/Associated Press)

World downhill champion Marion Rolland of France faces a long spell on the sidelines after further tests revealed she ruptured a knee ligament in a training crash last weekend.

She sustained the injury on Saturday in Chile and was flown back to France to assess the extent of the damage. The French Ski Federation said Friday that Rolland has ruptured her anterior cruciate ligament and has sprained her interior knee ligament.

The FFS said she will undergo surgery but did not say how long she is expected to be out.

The 30-year-old Rolland has struggled with injuries throughout her career. But in February, she won the world title on the Streicher course in Schladming, Austria.

Her best World Cup season showing in downhill came the in 2011-12, when she finished sixth.