Caucau - back to face Scots (Getty Images).

By Gareth Duggan, PA Sport, Sydney

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Fiji coach Mac McCallion believes his team's consistency is their biggest problem going into Saturday's Pool B clash with a Scotland side also struggling to find their best form on a regular basis.

Both sides struggled before subduing Japan, have been well beaten by France and pushed hard by the USA and McCallion knows he and opposite number Ian McGeechan desperately need their respective charges to put together 80 cohesive minutes at Aussie Stadium in Sydney.

"Scotland are in a similar position to what we are," said McCallion after naming a mostly predictable team to face the Scots.

"I am sure the coaching staff and management are a little bit frustrated because Scotland have not been playing to the best of their ability," he said.

"Likewise with us. We have not played to the best of our ability at this stage, so it could be a cracker of a game."

"I believe Scotland are under a lot of pressure because if they don't win this will be the first World Cup where they have not come through to the quarter-finals, and I am sure that the emphasis will be going on that."

McCallion's major task with Fiji has been to try and instil more precision and discipline in the forward pack, and he admits that has been a somewhat Sisyphean undertaking.

"I was a little bit frustrated but if you had been at this morning's training it was outstanding, but that's what I have got to cope with as the coach of this team," he said.

"They can be absolutely brilliant at one training run and absolutely horrible the next, and that is just something that I have to wear. It is hard to, but this morning I was very happy."

Asked whether he had found the magic formula to ensure Fiji played to their potential against Scotland, the former SAS soldier shrugged: "Hopefully it is discovered and we strike the right notes."

His team have produced some of the most breathtaking moments of improvised counter-attack at the tournament, with Rupeni Caucau and Filimoni Delasau among the best.

Caucau returns for this match after serving his two-match suspension for striking a French player in the first game, and Delasau is relegated to the bench as a result.

The presence of Caucau is a boost for the team after his scintillating try against the French set an early benchmark for try of the tournament, only for ill-discipline to let him down later in the same match.

Veteran fly-half Waisale Serevi said the winger's comeback would be a big help in trying to break the Scots down.

"He has been out for two games and now he is back, because he is good for the team and we need him," said Serevi, who is out of the game with a broken collar bone.

The injury to Serevi means Nicky Little wears the number 10 jersey he wore in the opening two matches before losing it to his older squad-mate for the match against Japan.

Serevi believes Little, like any fly-half, needs his pack to be going forward to give him space and therefore make him more effective.

"It is difficult for Nicky to play properly because the forwards are not going forward, so I think he needs them to do well," said Serevi.

"The forwards have been working hard, so hopefully he will get that time."

A key element in the forward pack for Fiji is hooker and former skipper Greg Smith, whose experience gives his team-mates a rallying point in the tight exchanges.

He is looking forward to his tussle for dominance with Scotland hooker Gordon Bulloch.

"He is a campaigner, he has been there for a long time and you don't hang around by mistake, you hang there for a reason," said Smith.

"He does the job and he does a very good job and he has been in the Lions and all sorts of other things," he said.

He and his fellow forwards have been working hard to ensure the problems which have dogged their performances so far are ironed out.

"Our set phases let us down a wee bit against Japan, so it has been set phase focus," he said.

"We need to win ball for our backs to be able to run and that is what we are trying to do."