He caused the biggest upset after beating 2018 Commonwealth Games gold medalist David Liti from New Zealand and silver medalist Lauititi Lui (Samoa) to win two golds for Tonga in the highest division (Over 109kg) of the weightlifting competition.
The 25-year-old won Gold in the Clean and Jerk category and the Overall category, and a Bronze medal in the Snatch category.
Tuitupou and fellow underdog Malachi Fa'amausilifala (Samoa) took full advantage of failed lift attempts by the favourites David Liti and Lauititi Lui.
