In 2018, the World Anti-Doping Agency appealed to the CAS after FIFA reduced a suspension of Peruvian national team captain Paolo Guerrero. Guerrero had tested positive for cocaine after a World Cup qualifier against Argentina after ingesting a tea containing the substance. Guerrero was initially suspended for a total of 12 months, but this was later halved by FIFA's appeal committee. WADA in turn appealed to the CAS and they imposed the 14 month ban in May 2018 which will cause Guerrero to miss the 2018 FIFA World Cup. The CAS confirmed the existence of an anti-doping rule violation (ADRV), but also accepted that Guerrero was not trying to enhance his performance by ingesting the substance. The panel had considered that the player did bear some fault or negligence, even if it was not significant, and that he could have taken some measures to prevent him from committing the ADRV.
