That year he scored in the final of the under-17 league to win the title.
[7] Mateariki was part of the Cook Islands squad chosen for the 2017 OFC U-17 Championship.
[1] He converted a penalty against American Samoa for his team's only goal of the tournament.
[10][11] In March 2022 Mateariki was included in the Cook Islands senior squad for 2022 FIFA World Cup qualification.
[12] He went on to make his senior international debut on 17 March 2022 as a starter in the opening match against the Solomon Islands.