Samples at the Doping Analysis Laboratory (Reuters / Stringer)The World Anti-Doping Agency has closed its laboratory in Madrid, Spain, after the negligence of its employees ruined an athlete’s career. According to RusAthletics.com, the decision was made after it was proven that the lab workers’ clumsiness led to a forbidden substance getting into a doping probe. As a result an innocent athlete, whose name has not been released, tested positive and received a disqualification.It’s not the first time WADA has halted the operation of their laboratories around the globe over costly errors. Earlier, the licenses of anti-doping centers in Rio de Janeiro, Brazil, and Ankara, Turkey, were also revoked. The lab in the Turkish capital was prevented from working for a year-and-a-half after making a mistake while probing three-time Olympic basketball champion Diana Taurasi of the USA.Meanwhile, the current scandal may become a huge blow to Madrid’s hopes of hosting the 2020 Olympics. The Games’ host city is to be announced in September next year, with Istanbul and Tokyo also in the running.