Scott Sio signed a deal with the Wallabies and Brumbies until at least the end of 2022.
Racing 92 boosted its hopes of qualifying for the European Champions Cup by thrashing bottom side Perpignan 52-14.
Top 14 leader Toulouse saw its unbeaten league run end at 14 games courtesy of a 25-10 loss to Toulon, which played most of the second half with 14 men.
Top 14 defending champion Castres closed the gap to the top two as it defeated basement side Perpignan 36-17.
Top 14 leader Toulouse moved six points clear with a 27-14 defeat of Montpellier as Stade Francais halted La Rochelle's four-match winning run.
Julian Savea has vowed it will be business as usual after being singled out for criticism in a bizarre rant from Toulon president Mourad Boudjellal.