Australia are welcoming back Christian Lealiifano and James O'Connor for their clash against Argentina.
New Zealand have moved Beauden Barrett to full-back for their meeting with South Africa.
Rassie Erasmus has made 12 changes to his team as South Africa prepare for New Zealand, with Duane Vermeulen captain against the All Blacks.
Will Genia believes James O'Connor will grasp his chance if a six-year Wallabies exile comes to an end when Australia face Argentina.
Head coach Steve Hansen is relishing what promises to be another almighty battle with South Africa this weekend.
Joe Marchant is among the 38 players who have made the trip to Italy as England step up their preparations for the Rugby World Cup.
The fourteen South Africa players who flew to New Zealand on Thursday will be joined by another 22.
Head coach Steve Hansen says New Zealand's less-experienced players will learn from a huge battle with Argentina.