SAO PAULO -- Former Brazilian left-back Roberto Carlos, who was part of the team that won the 2002 World Cup, denies accusations of doping made in a German documentary.
Broadcaster ARD/WDR aired a documentary on Saturday that alleges Roberto Carlos was a patient of a doctor who has been accused of helping athletes use banned performance-enhancing substances.
The network says Roberto Carlos' name appeared in a dossier that Brazilian anti-doping authorities gave to the Sao Paulo prosecutor's office.
In a statement, Carlos says he has "never used any artificial [substance] that would give me an advantage over my fellow players."
He said his lawyers were taking action to fight the allegations.
He added: "Throughout my career, I always defended a clean game."
Roberto Carlos played for Real Madrid and won three Champions League titles.