Knox scored three unanswered tries in the final 20 minutes of their opening round CAS clash to beat Cranbrook 31-10 at Wahroonga.

Wearing predominately black jersey’s to celebrate the school's centenary, Knox opened the scoring with a try from a driving maul in the 7th minute, scored by hooker Marcus Aitchison.

Cranbrook dominated possession and territory for the next 20 minutes though and eventually crossed through backrower Seb Latham.