AP
FILE - In this Dec. 15, 2017 file photo Russia's Alexander Tretiakov struggles to start his first run in the men's Skeleton World Cup race in Innsbruck, Austria. The Court of Arbitration for Sport ruled on Thursday, Feb. 1, 2018 to reinstate Tretiakov as gold medal winner of the men's skeleton at the 2014 Sochi Winter Olympics. (AP Photo/Kerstin Joensson, file)
- Kerstin Joensson
Matthieu Reeb, CAS Secretary General, speaks during a press conference about Russian athletes who are challenging the decisions taken by the Disciplinary Commission of the International Olympic Committee (IOC DC) ahead of the 2018 Winter Olympics in Pyeongchang, South Korea, Thursday, Feb. 1, 2018. (AP Photo/Felipe Dana)
- Felipe Dana
Matthieu Reeb, CAS Secretary General, leaves a press conference after speaking about Russian athletes who are challenging the decisions taken by the Disciplinary Commission of the International Olympic Committee (IOC DC) ahead of the 2018 Winter Olympics in Pyeongchang, South Korea, Thursday, Feb. 1, 2018. (AP Photo/Felipe Dana)
- Felipe Dana
Matthieu Reeb, CAS Secretary General, speaks during a press conference about Russian athletes who are challenging the decisions taken by the Disciplinary Commission of the International Olympic Committee (IOC DC) ahead of the 2018 Winter Olympics in Pyeongchang, South Korea, Thursday, Feb. 1, 2018. (AP Photo/Felipe Dana)
- Felipe Dana
FILE - In this Feb. 23, 2014 file photo Russia's gold medal winner Alexander Legkov skis past the Olympic rings during the men's 50K cross-country race at the 2014 Winter Olympics in Krasnaya Polyana, Russia. The Court of Arbitration for Sport ruled on Thursday, Feb. 1, 2018 to reinstate Leskov as gold medal winner of the men's 50-kilometer cross-country skiing which he was stripped of on doping allegations earlier. (AP Photo/Dmitry Lovetsky)
- Dmitry Lovetsky