Last August, Mathias Fluckiger it was found positive to a prohibited anabolic substance. From the Swiss news site (RSI Sports), Mathias declares "I have never taken the substance knowingly. Given the amount of substance detected by the World Anti-Doping Agency and the samples that tested negative before and after the offending one, this test should have been considered as "atypical" and not "positive".
To prevent negative judgments, the world anti-doping authority has issued special instructions for this type of case that according to Flückiger and his staff "unfortunately have not been followed". The Bernese was able to request and consult all the documents of the Lausanne laboratory, where the tests were carried out.