Justyna Kowalczyk of Poland competes during the women's 10km event at the FIS Cross Country World Cup in Otepaa, Estonia, Feb. 19, 2017. (Xinhua/Sergei Stepanov)
Justyna Kowalczyk of Poland competes during the women's 10km event at the FIS Cross Country World Cup in Otepaa, Estonia, Feb. 19, 2017. (Xinhua/Sergei Stepanov)