Gold medalist Martin Johnsrud Sundby competes during the men's 15km event at the FIS Cross Country World Cup in Otepaa, Estonia, Feb. 19, 2017. (Xinhua/Sergei Stepanov)
Gold medalist Martin Johnsrud Sundby competes during the men's 15km event at the FIS Cross Country World Cup in Otepaa, Estonia, Feb. 19, 2017. (Xinhua/Sergei Stepanov)