Kangaroos superstar Greg Inglis is disappointed the Australians haven't got the credit he believes they deserve for their rampage through the Rugby League World Cup.

Australia play a semi-final on Sunday against Fiji in Sydney after breezing through their three pool games, scoring 128 points to 16 against leading contenders New Zealand and England and a spirited Papua New Guinea.

While the Kangaroos have piled up points and scored plenty of tries, some pundits believe they have been clinical and efficient rather than spectacular.

Centre Inglis, who is among the 10-team tournament's leading tryscorers with four, said he believed the Kangaroos deserved more respect than they had received so far.

"Everyone does expect us to win all the time, everyone is expecting us to slip up one day and I don't think we will ever let that happen," Inglis told AAP.

"I think we thoroughly deserve the praise that we should be getting but we're not.

"We're just out there to do our job, we're not worried about what people say or think.

"It is disappointing that we aren't getting the praise we should be getting but it's international footy and they are waiting for us to slip up and I don't think we will take any team lightly.

"We do want to prove them wrong, we have done in the last few years because Australia has been so dominant in the rugby league world.

"The only time we slipped up was against New Zealand (who beat Australia 24-0) over in England (in 2005) and that was a definite wake-up call for us.

"That day all the boys were devastated and heart-broken and ever since then we've been striving to succeed and (coach Ricky Stuart) has been outstanding in that area."

Stuart recalled Inglis among a host of stars who were rested from last Sunday's final pool game against PNG.

Returning to the starting side are Inglis, skipper Darren Lockyer, prop Petero Civoniceva, fullback Billy slater and second-rowers Glenn Stewart and Anthony Laffranchi.

Karmichael Hunt has beaten Scott Prince to the utility spot on the interchange bench.

Inglis insisted Fiji were a danger to Australia despite few people giving them any hope of upsetting the Kangaroos.

"They are a pretty dangerous and frightening team, they've got the likes of (Parramatta star) Jarryd Hayne, (Bradford winger) Semi Tadulala, they could be the dark horse in this tournament and we are looking out for them," Inglis said.

But ominously for the other three semi-finalists, Inglis was adamant Australia still had plenty of scope for improvement.

"Sitting back and watching us play last week against PNG, there's still little things that no-one knows that we do, because we train for them and if we get them down pat I think we should be sweet on Sunday," Inglis said.

Inglis' centre partner and 2008 Melbourne team-mate Israel Folau was wary of Fiji's speed and strength.

"They are pretty strong all over the park, but I think we've got a good strong backline, so it will be a pretty tough challenge for our outside backs on Sunday night," Folau said.

Australia: Billy Slater, Joel Monaghan, Greg Inglis, Israel Folau, Brent Tate, Darren Lockyer (capt), Johnathan Thurston, Petero Civoniceva, Cameron Smith, Steve Price, Glenn Stewart, Anthony Laffranchi, Paul Gallen. Interchange: Karmichael Hunt, Craig Fitzgibbon, Anthony Tupou, Brent Kite.

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