The incident happened in a high charged moment at the Brisbane Tens where Tupou was playing for the Queensland Reds.
Tupou was cited and suspended as the former New Zealand schoolboys star literally came head to head with some tough senior competition from his old homeland.
In a statement released by organisers late on Sunday, judicial officer Chris Newton accepted a guilty plea from the young Tupou for contravening Law 10.4 (a): Striking with the head.
