Star prop an injury doubt for Wallabies' World Cup clash with Fiji

Tupou shone for Australia in their victory over Georgia in their tournament opener at the Stade de France on Saturday but missed a Wallabies training session on Wednesday due to a hamstring issue.

The tighthead prop is the latest Wallabies front-row to sustain an injury after James Slipper and Pone Fa'amausili missed their 35-15 triumph over the Lelos.

Wallabies attack coach Jason Ryles said although Tupou is an injury doubt, he has not been ruled out yet.

The 27-year-old played a key role in helping the Wallabies dominate the scrum against Georgia while he also set up a try for Ben Donaldson in the second half.

"Taniela is on the sideline at the moment, he has got a bit of a hamstring complaint but we're just going to monitor him and just see how he goes over the next couple of days," Ryles told AAP.

"He didn't train today but that's not unusual for Taniela, don't worry."

Veteran loosehead prop Slipper, who is the most experienced player in the Wallabies camp with 131 Test appearances for his country, is battling a foot issue and was in and out of Wednesday's training session, while tighthead Fa'amausili has been struggling to overcome a calf issue.

"Slips (Slipper) has been managed at this stage," said Ryles.

"I think he's certainly in the picture but we're not exactly sure how that's going to pan out, whether it's this week or next week.

"Himself and Pone have been doing a lot of stuff off field and then dropping into training at different stages with what their injuries allow them to and what the medical team allow them."

Australia are set to play Wales in their third match - which could be a pool decider - and Jones wants to give Slipper some game-tie against Fiji but can't afford to play him if he's not 100 per cent.

Ryles said the were not focusing on the Wales clash but said they are wary of the Fijians, who claimed a shock win over England at Twickenham ahead of the Rugby World Cup.

"It's very cliched but all we've got on our minds is this week and how best we can prepare for that," the former Melbourne and Sydney Roosters NRL assistant coach said.

"We want to get our next couple of days right and play the best we can and we believe if we play near our best, then we're going to be hard to beat."

READ MORE: Victor Matfield believes Rassie Erasmus heading to Ireland after World Cup