According to FIFA president Sepp Blatter, "We did different tests at the Under-17 World Cup in Peru but the evidence wasn't clear so we will carry out trials in junior competitions in 2007".
国际足联主席布拉特曾表示，“我们在秘鲁的U-17世界杯上做过了各种各样的测试，然而结果并不显著，所以我们还会在2007的青少年比赛中进行试验”。