Tottenham head coach Ange Postecoglou has warned any proposal to introduce blue cards and sin bins will destroy football.
It was revealed on Thursday that a trial could commence soon where a blue card would be shown for dissent and professional fouls where the offenders would be sin binned for 10 minutes.
FIFA has since clarified the trial will not occur in elite football, while football's lawmakers, the International Football Association Board, will not publish plans for the sin bin trial until next month.
However, Postecoglou was unequivocal in his belief it would be a wrong move.