Taking into account the circumstances of the case, the FIFA AC imposed a 6-month period of ineligibility on the Player, instead of the 1-year minimum suspension provided by the FIFA Anti-Doping Regulations, applicable in case of no significant fault or negligence.
Peru's preparation for the Russian Federation 2018 World Cup [VIDEO] suffered a major hitch after their captain Paolo Guerrero lost an appeal for a failed doping test. Guerrero is facing a World Cup ban as a result.
Guerrero had a ban over taking an illegal substance instituted by the Court of Arbitration for Sport, following an appeal by the World Anti-Doping Agency to extend an initial sixth-month ban from Federation Internationale de Football Association, which had been shortened from its first length through an appeal by the player.
But less than a week after he attended a CAS hearing in a bid to completely annul a ban for testing positive for traces of cocaine, CAS increased his sentence for falling foul of "an anti-doping rule violation (presence of Benzoylecgonine metabolites)".
The 34-year-old footballer is in Peru's provisional squad that was named on Sunday.
Peru fans showed their support for him in Geneva.
In December, FIFA handed him a 12-month ban, ruling him out of the World Cup, but that was cut to six months on appeal a few days later, freeing him to play in the tournament.
The Dutch-based union pointed out the CAS itself had accepted that Peru's all-time leading scorer did not intend to enhance performance and had not knowingly ingested the substance.
CAS said that Guerrero bore "some fault or negligence, even if it was not significant, and that he could have taken some measures to prevent him from committing an anti-doping violation".
Two weeks ago, the former Bayern Munich striker returned to play for his Brazilian club side Flamengo.
"To the people who've contributed to this shameful injustice (I say to them), you are stealing my World Cup and perhaps also my career". They questioned the CAS's intentions for the ban despite admitting that Guerrero was not significantly negligent and his intention was not to enhance his performance.