Leicester centre Manu Tuilagi has been ruled out of England's entire QBE Series at Twickenham with a groin injury.
Wales boss Warren Gatland has told Adam Jones and James Hook that "the door is not closed" on their futures.
Ireland will be without Andrew Trimble and Luke Marshall for the autumn internationals due to injury.
The Barbarians will hand New Zealand fly-half Colin Slade the chance to heap yet more misery on Australia on November 1.
Julien Bardy will face a charge of striking England No 8 Billy Vunipola with his knee in Clermont's defeat at Saracens.
Ospreys number eight Dan Baker has escaped serious injury after being carried off during Sunday's 42-7 rout of Treviso.
Scotland head coach Vern Cotter has named Grant Gilchrist as captain of the squad for the autumn internationals.
England are waiting to learn the severity of Manu Tuilagi's injury, with the Leicester centre set to miss three weeks.
Saracens hooker Schalk Brits has been ruled out until "well into the new year" after suffering a knee injury.
Former Leinster coach Michael Cheika is expected to be named as Australia’s new coach.