Wales may be spared the prospect of facing giant Wallaby Wendell Sailor after the wing was forced out of the game against Ireland early with a rib injury.
The former rugby league star went off after an hour of Saturday's success and the Wallaby management insisted he will not be risked against Wales if he is not fully fit.
However another former rugby league star Matt Rogers came though his comeback game from injury for club side Southern Districts over the weekend and is expected to be back in the frame for the Sydney clash.
Meanwhile, Test veteran Matt Burke was also set to join the Australia squad today after sitting out the Ireland game with a knee injury.
The 68-times capped full-back, who has scored 833 points in Test rugby, has been troubled by a medial ligaments problem but will be given his chance this week to prove his fitness in time for Saturday.
As the countdown continues for RWC2015, Tournament Chief Executive Debbie Jevans visited the Millennium Stadium to discuss preparations for the eight matches and reveal the positive news that 100,000 tickets for games at the home of Welsh rugby have sold in the last seven days.
Jason Harries is targeting a first win on the World Series circuit this season with Wales. The series returns to action this weekend in Dubai where Harries is part of a team hoping to build from its efforts in round one in October.
Wales skipper Jevon Groves says his side have addressed a few points from Gold Coast and aim to 'hit the ground running' in the next two rounds of the World Series, kicking off with this weekend in Dubai before heading off to South Africa next week.
Wales Sevens manager Steff Thomas is hopeful his side can build from a quarter-final spot in the opening round of the World Series in Australia when his side take part in the forthcoming double header in Dubai and South Africa.