The Six Nations champions are set to be crowned at the end of October and it remains to see if there will be any fans in attendance.
The Dragons have added Jamie Roberts to their squad ahead of their return to Pro14 action this month.
Sunday's bonus-point win at Forsyth-Barr Stadium moved the Blues to 22 points, just two points adrift of Super Rugby leaders the Crusaders.
The Brumbies were victorious once again in Super Rugby AU, though left it late to see off the Reds in Canberra.
The Chiefs were unable to mark Aaron Cruden's 100th appearance with a victory as the Crusaders bounced back from losing to the Hurricanes.
After the scores were deadlocked at 20-20 after 80 minutes, Isi Naisarani's try sealed victory for the Rebels against Western Force.
Highlanders CEO Roger Clark said the club are "extremely disappointed" by the conduct of some of their players last weekend.