Former FIFA president Sepp Blatter has said frozen balls containing team names have been used to rig European football's club competition draws.Draws to decide which teams play each other are conducted by selecting the table tennis-size balls from plastic bowls. The balls are unscrewed to reveal the team names inside.
Blatter, however, insisted the ruse was never used at FIFA.
"Of course it's technically possible. That doesn't happen in FIFA but I witnessed draws, at European level, in which that happened, but never at FIFA," Blatter told Argentine daily La Nacion in an interview on their website.
The draw was clean down to the last detail. I never touched the balls, something others did. Of course you can make them stand out, heating them or freezing them," he said in the La Nacion interview published on Monday.
Argentina were drawn with Nigeria, Bosnia and Iran in Group F at the tournament in Brazil and went on to reach the final where they lost 1-0 to Germany.
Swiss Blatter, 80, was among dozens of FIFA officials brought down after revelations of years of corruption in the sport's world ruling body.
Blatter and Michel Platini, president of European football governing body UEFA, were banned over a payment of 2 million Swiss francs ($2.82 million) made by FIFA to the Frenchman in 2011, with Blatter's approval, for work done a decade earlier.
Both men have denied any wrongdoing.