Reece Hodge will miss Australia's Rugby World Cup matches against Wales, Uruguay and Georgia through suspension.
Uruguay claimed their third Rugby World Cup win with a shock victory over Fiji.
Schalk Brits will start at number eight for a much-changed Springboks side against Namibia.
Despite Israel Folau's announcement, the ex-Australia rugby union international is awaiting approval to represent Tonga in rugby league.
Only five players who started against Namibia remain for Italy's clash with Canada in Pool B on Thursday.
Rugby World Cup hosts Japan will become the latest outfit to attempt to unsettle Ireland superstar Johnny Sexton this weekend.
George Ford hopes a much-changed England team can improve on their opening display when they face the United States.
Russia were beaten 34-9 by Samoa in Pool A, but captain Vasily Artemyev has no doubt they belong at the Rugby World Cup.
Samoa went down to 13 men during the first half, but Russia failed to capitalise before Steve Jackson's side cruised to a bonus-point win.
World Rugby said match officials' performances in the opening games of the Rugby World Cup in Japan were not up to standard.
Billy Vunipola took some big hits in England' Rugby World Cup opener against Tonga, but has been named to start against the United States.
Henry Pyrgos has replaced Ali Price in Scotland's Rugby World Cup squad, after the scrum-half was ruled out of the rest of the tournament.
Wales have called up experienced lock Bradley Davies in place of the injured Cory Hill, who will play no part in the Rugby World...
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England coach Eddie Jones has named a much-changed side for Thursday's Rugby World Cup encounter with the United States in Kobe.
Wales were not always at their best in a 43-14 win over Georgia, but Warren Gatland is full of confidence ahead of a clash...
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Uruguay begin their Rugby World Cup campaign against a Fiji side that have made wholesale changes after their defeat to Australia.