The scrum-half left the field after he was injured in a collision with South Africa's second-row Lood de Jager, and it has now emerged that he has been operated on.
The Crusaders are the official Super Rugby Pacific champions after beating the Chiefs in an incredibly physical match at the Apollo Projects Stadium on Saturday.
Following the announcement of Joe Schmidt's Wallabies squad, we pick our winners and losers from the team to face the Springboks in the Rugby Championship.
