The New Zealand vice-captain, Tana Umaga, who ruptured his left posterior cruciate ligament in his side's opening Pool D match against Italy, may return for the quarter-finals. His team-mate Ali Williams faces Tonga on Friday after recovering from a fractured foot which the lock suffered in the World Cup build-up.
France have a full squad for Saturday's match against Scotland following the return of Sylvain Marconnet. The tighthead prop pulled a leg muscle in training and missed France's first two games.
The Springboks made 13 changes to the side beaten by England for their game against Georgia on Friday. The lock Bakkies Botha and No 8 Joe van Niekerk retain their places.
Australia's vice-captain, David Giffin, will undergo a fitness test tomorrow to see if he can play against Namibia on Saturday.
Canada's coach, David Clark, says "arrogance" has ended the traditional swapping of jerseys and post-match beers shared with opponents. "When you come up against the big professional teams, there's a slight arrogance about it, that they snub their noses at those sort of things," he said.
The Italy coach, John Kirwan, is resisting claims that his side will take a quarter-final berth ahead of Wales. The teams meet on Sunday in a game likely to decide second place in Pool D.