Coetzer received a late call-up to the Junior Springbok World Rugby U20 Championship squad as a replacement for the injured Damian Willemse.
He grabbed the opportunity with both hands and earned a spot in the starting lineup for the bronze playoff against New Zealand.
In May 2019, he was named in the Junior Boks squad for the World Rugby U20s Championship.
(LS May 29, 2019)
|South Africa U20's
|2018 - present|