In Round 9 of the 2020 Mitre 10 Cup Christie played his 50th game for the Mako against Canterbury at Lansdowne Park in Blenheim.

The Mako went on to win their second premiership title in a row with Christie playing every minute of the 12–13 victory over Auckland in the final at Eden Park.

He was out injured before the season was cancelled, but then played in the Super Rugby Aotearoa competition making his Blues debut against his old team the Hurricanes at Eden Park.

After the 2021 Super Rugby season Christie was named in the New Zealand squad to play Tonga and Fiji in the July Steinlager Series.

[5] He made his debut against Tonga at Mount Smart Stadium, coming off the bench in a 102–0 win, becoming All Black number 1196.