Russian bobsledder Nadezhda Sergeeva admits to doping at Olympics

PYEONGCHANG, South Korea -- A Russian bobsledder who tested positive for a banned substance at the Pyeongchang Olympics has admitted to doping and has been disqualified from the games.

The Court of Arbitration for Sport on Saturday said Nadezhda Sergeeva has accepted a provisional suspension but reserved her right "to seek the elimination or reduction" of her expected ban from competition.

Sergeeva, who wore a T-shirt at the start of the games that read "I don't do doping," was the second Russian to test positive at the Olympics. Curler Alexander Krushelnitsky also tested positive, and he returned his bronze medal from the mixed doubles competition. Krushelnitsky admitted to having meldonium in his doping samples despite denying that he knowingly took a banned substance.

Two other athletes also tested positive at the Pyeongchang Games. Slovenian hockey player Ziga Jeglic and Japanese speedskater Kei Saito also left the games.

Sergeeva, who finished 12th in the women's bobsled, tested positive for Trimetazidine, a medication used to treat angina. It affects metabolism and is banned by the World Anti-Doping Agency.

Russian athletes are competing under the Olympic flag in Pyeongchang after the country's national federation was suspended because of a doping scheme that tarnished the country's results at the 2014 Sochi Winter Games.

The International Olympic Committee upheld its ban of Russia from the Winter Games, denying the country the chance to march into the closing ceremony under its own flag.