Poland's Justyna Kowalczyk has said that her determination to continue despite a fractured foot was the key to her winning gold at the 2014 Winter Olympics in Sochi.
The 31-year-old, who suffered the fracture in her left foot last month, finished first in the women's cross-country 10km classic on Thursday.
"I felt an ache in my foot, but I overcame it," she told reporters. "We knew what we were here for.
"It was unlucky that it happened to me. Everything was going wrong, but I am not one of these people who give up."
Sweden's Charlotte Kalla won the silver medal in the event, while Therese Johaug of Norway clinched bronze.
