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Sergey Ustiugov of Russia (L) and Dario Cologna of Switzerland compete during the men's 10 km mass start race at the FIS cross country Tour De Ski event on January 1, 2017 in Tschierv, Val Mustair. / AFP / FABRICE COFFRINI (Photo credit should read FABRICE COFFRINI/AFP/Getty Images)

Sergey Ustiugov of Russia (L) and Dario Cologna of Switzerland compete during the men's 10 km mass start race at the FIS cross country Tour De Ski event on January 1, 2017 in Tschierv, Val Mustair. / AFP / FABRICE COFFRINI        (Photo credit should read FABRICE COFFRINI/AFP/Getty Images)