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Input: Russian Bobsled Federation president Alexander Zubkov told The Associated Press on Friday that a drug-test sample that  pilot Nadezhda Sergeeva  gave on Sunday was positive.
" She  confirms  she  took no such medication and the team confirms  she  was not issued any medication " said Zubkov  a former bobsledder who himself was stripped of two Olympic gold medals for the Russian doping scheme at the 2014 Sochi Games. "Federation representatives at the Olympics" are starting to prepare a defense  he said.
Zubkov also said a sample  she  had given five days earlier was negative.
 Nadezhda Sergeeva  (right) has tested positive for trimetazdine  which is listed as a banned substance by the World Anti-Doping Agency.
 Sergeeva 's crew finished 12th in the women's bobsled competition on Wednesday  after she had given the sample that later came back positive.
Earlier this month   Sergeeva  told the AP that competitors from other countries had warmed to her after she passed IOC vetting for Pyeongchang  which included an examination of her drug-testing history.
"I don't know why  but they've started talking to us more than ever before. I feel it. Maybe it's a sign to them that we're clean  " Sergeeva  said. "There's a lot of people coming up and saying  'We're happy you're here.'"
At the time  she was training in a T-shirt with the words "I Don't Do Doping."  Sergeeva  used to compete in track and field as a heptathlete before switching sports in 2010.
 Sergeeva  switched to driving a bobsled after competing in track and field as a heptathlete.
Trimetazidine  the substance found in  Sergeeva 's sample  has been detected in previous doping cases. Chinese swimmer Sun Yang  an Olympic gold medalist  was banned for three months in 2014 by his country's sports authorities after testing positive for the substance.

Russian who wore 'I Don't Do Doping' T