Slovakia's Anastasiya Kuzmina became the first woman to successfully defend the Winter Olympics 7.5km biathlon sprint title by storming to gold.
Kuzmina, 29, clocked a time of 21 minutes 6.8 seconds to finish nearly 20 seconds ahead of her nearest rival.
Russia's Olga Vilukhina took silver, with Vita Semerenko of Ukraine claiming the bronze medal.
There was no medal for either of the pre-Games favourites, with Darya Domracheva ninth and Tora Berger 10th.
Kuzmina, who also won silver in the 10K pursuit in Vancouver four years ago, is the sister of Russian biathlete Anton Shipulin, who lost his chance for a medal in the men's 10K sprint on Saturday after missing the final target.
"This victory in my homeland is a big thing. I am Russian after all, although I am Slovakian passport holder, this is my home," said Kuzmina.
"There are mixed feelings involved. I felt for Anton yesterday. I didn't see the whole race but I was crossing my fingers for him. When I approached the starting line today, I told myself, if it is my day, I will dedicate my medal to him."
Great Britain's Amanda Lightfoot, who had been targeting a top-30 place, finished 75th.