Olympic skeleton champion Lizzy Yarnold has said she may boycott next year's world championships in Sochi because of concerns about doping.
Yarnold, from Britain, won gold at the Sochi Olympics in 2014 -- a venue that has since been overshadowed by findings of widespread, state-sponsored doping in Russia.
Yarnold said the International Bobsleigh and Skeleton Federation should reconsider allowing Sochi to host the championships.
Other athletes who competed in Sochi have also expressed concern, including Latvian men's skeleton silver medalist Martins Dukurs and U.S. women's skeleton veteran Katie Uhlaender, who was fourth and finished behind a Russian slider.
A report from the World Anti-Doping Agency in July revealed Russia had a doping program during the London 2012 Olympics and the 2014 Sochi Games. Evidence from the former head of Russia's national anti-doping laboratory, Grigory Rodchenkov, claimed dozens of Russian athletes were doping at the Winter Olympics.
"It's very important to me to compete in sport for the right reasons, to have sportsmanship and to be clean; to stand on the start line and to trust in the system -- and at the moment the system just isn't up to it," Yarnold said in an interview with British media.