Petra Vlhova led Mikaela Shiffrin by 0.76 seconds after the first run of a World Cup slalom.
What happened?
Vlhova extended her big lead to more than a second but straddled a gate in the steep section.
She failed to finish her second run, giving Shiffrin the win.
Shiffrin finished 0.18 ahead of Leona Popovic of Croatia.
Why it matters for Petra Vlhova
Vlhova's mishap cost her a clear victory, with Shiffrin admitting Vlhova "earned this victory".
Shiffrin secured her record-extending 89th career World Cup win.
Vlhova had dominated Saturday's race on the same hill, winning by a big margin of 1.41 seconds.
What comes next?
Shiffrin will skip the two cross-border Zermatt-Cervinia downhills in Switzerland and Italy next week.
The men's races on the Matterhorn mountain were canceled due to heavy snowfall.
Petra Vlhova's performance this weekend showed her skill in slalom skiing.
And her speed was impressive, with a big lead after the first run.
But her failure to finish the second run cost her the win.
So Shiffrin took advantage and secured her 89th career World Cup win.
Vlhova's result on Saturday was impressive, with a win by a big margin.
Her performance on Sunday was also strong, until she straddled the gate.
The World Cup standings now show Shiffrin in the lead.
With 14 wins last season and her fifth overall title, Shiffrin is a strong competitor.
But Vlhova is also a skilled skier, with a dominant performance this weekend.
As Mikaela Shiffrin said, "Petra really did a masterclass in slalom skiing this weekend".