De Groot made his international debut for on 10 July 2021 against
Fiji at
Dunedin, becoming the first Southlander to debut for the national side since
Elliot Dixon in 2016. De Groot scored his first test try in a 104–14 win over the United States; the test match in which he first started for the All Blacks. De Groot was not selected for Ian Foster's first All Black Squad in 2022, with Aidan Ross and Angus Ta’avao selected ahead of him. However, with the All Blacks being handed their first home series loss to Ireland, de Groot was re-selected for the
2022 Rugby Championship squad. De Groot became a regular starter for New Zealand in 2022, playing nine tests and scoring one try that season. Retaining his role as the first-choice loosehead prop in 2023, de Groot was selected in
Ian Foster's 33-man squad for the
2023 Rugby World Cup. De Groot became the
first New Zealand player to be given a red card in a Rugby World Cup in the pool stage of the tournament. In this pool game against Namibia, a 71–3 win, he was initially given a yellow card for a high tackle on Adriaan Booysen, with a 'bunker' review upgrading it to a red. De Groot returned from a suspension to produce strong performances in New Zealand's quarter and semi-final fixtures against Ireland and Argentina respectively before he started in the World Cup final; an 11–12 loss to South Africa. == References ==