Tupou made his début for Bradford against Huddersfield Giants in the quarter-finals of the 2007 Challenge Cup on 6 June with two tries as a substitute in the Bulls' win.

At the end of that year Tupou was selected for New Zealand's 2007 All Golds tour of Great Britain.

[7] In April 2009 Bradford released Tupou after a Rugby Football League tribunal allowed the club to exercise a clause in his contract which stated that the player's contract could be terminated if he was unable to play or train for a 26-week period in any one year.

[8] In July 2009 it was announced by Bradford that Tupou had signed for the Wests Tigers in the NRL competition with immediate effect.

[9] Tupou failed to make any appearances in the 2009 or 2010 seasons due to his on going battle with knee injuries.