Switzerland’s supreme court said on Thursday its panel of five federal judges rejected Guerrero’s appeal against FIFA and the World Anti-Doping Agency.
The Swiss Federal Tribunal ruling announced on Thursday delays the 35-year-old player’s return to action with Brazilian club Internacional until early April.
He tested positive for a metabolite of cocaine at a World Cup qualifying game against Argentina in October 2017. He argued that he drank contaminated tea at a hotel.
The Court of Arbitration for Sport extended FIFA’s six-month ban to 14 months. That case was heard after Guerrero appealed to overturn the ban, and WADA requested a longer sanction than FIFA’s appeals committee imposed.
However, a Swiss judge froze the ban last year to let Guerrero play at the World Cup in Russia, noting it could be a “crowning glory of his career” in Peru’s first World Cup appearance for 36 years.
Federal judges ordered him to pay court costs of 7,000 Swiss francs ($6,970), and 8,000 Swiss francs ($7,960) to WADA.