Mikaela Shiffrin says she is dealing with post-traumatic stress disorder following a crash in November and will not defend her gold medal in giant slalom at the Alpine skiing world championships.

American Mikaela Shiffrin will not take part in the giant slalom event at the world championships in Austria, saying on Monday that she is not yet mentally ready after her recent return from injury but will now compete in the team combined competition.

Mikaela Shiffrin said Monday she will not defend her giant slalom title at the World Ski Championships, but the US star will race with newly-crowned downhill champion Breezy Johnson in the women's

Mikaela Shiffrin will not participate in the giant slalom at the world championships in Austria, citing mental readiness after a recent injury. Instead, she will compete in the team combined event alongside Breezy Johnson.

Mikaela Shiffrin says she is dealing with post-traumatic stress disorder following a crash in November and will not defend her gold medal in giant slalom at the Alpine skiing world championships.

American Mikaela Shiffrin will not take part in the giant slalom event at the world championships in Austria, saying on Monday that she is not yet mentally ready after her recent return from injury but will now compete in the team combined competition.