FIFA says all samples have tested clean in its World Cup anti-doping program, though no unannounced controls have been made in Brazil, according to Reuters.
FIFA's chief medical officer Jiri Dvorak says analysis of all pre-competition and post-match samples was completed through the first quarterfinal match last Friday, Reuters reported.
All 736 players have given blood samples for their individual biological passport, according to Reuters. Two players from each team are randomly picked to give samples after each match.
Dvorak says no doping controls were taken on days between matches, adding that all samples "arrived in good condition" at the World Anti-Doping Agency-accredited laboratory in Lausanne, Switzerland, where samples are tested, Reuters reported. WADA revoked the Rio de Janeiro lab's credentials last year.
Dvorak said 777 out-of-competition tests were conducted between March 1 and June 11 plus another 232, four from each of the first 58 matches played in Brazil, since the tournament kicked off on June 12, and all came back negative, according to Reuters. No player has tested positive at a World Cup since Argentina's Diego Maradona in 1994.
Soccer has long viewed itself as largely immune from the use of performance enhancing drugs which has badly tarnished other sports such as cycling, Reuter reported.
Even on Monday, Michel D'Hoogie, the chairman of FIFA's Medical Committee, said he did not think the use of performance enhancing drugs was widespread in the game, according to Reuters.
"I will never say there is no doping in football, but I say there is no doping culture in football," D'Hoogie told a news conference, Reuters reported.
FIFA has steadily stepped up its drug testing procedures over recent years, including the introduction of biological profiling of players to track changes in their blood samples, according to Reuters. In conjunction with WADA, FIFA began building profiles on players in 2011 but this is the first time it has used it at the World Cup.
