Australian winger Drew Mitchell scored a hat-trick against Fiji

The Wallabies scored seven tries to claim top spot in Pool B but Connolly said they were far from polished.

"The positives are that we finished number one [in the group] and we played some very good rugby," said Connolly.

"But we were loose in other sections, that's a concern. The negatives are that mentally we weren't there at times, we played as individuals."

We're not overly happy with the way we played, but there's a certain amount of satisfaction that we scored 50-odd points Wallaby coach John Connolly

Left wing Drew Mitchell scored a hat-trick, while man-of-the-match Matt Giteau bagged a brace and kicked 17 points on the occasion of his 50th cap.

Centre Adam Ashley-Cooper and replacement Stephen Hoiles also scored against a second-string Fiji side, who were saving their powder for the crunch Pool B game against Wales in Nantes on 29 September.

"I guess we're happy with the result and if anyone had offered this to us three weeks ago we would have taken it," Connolly said.

"We're not overly happy with the way we played, but there's a certain amount of satisfaction that we scored 50-odd points, we're number one and we know where we're headed now, so that's good."

Wallaby veteran George Gregan, 34, who led his country for the 59th time to equal the international Test captaincy record held by England's Will Carling, praised Fiji's spirit.

I'm pleased with the way the younger players came through, knowing that it is a tougher game for us against Wales next week Fiji coach Ilie Tabua

"We probably should pay some credit to Fiji, they came out very spirited and they are very proud nation. The Pacific island teams have shown that this week and that is certainly what their game was today," Gregan said.

Fijian coach Ilie Tabua said he was proud of the performance from his weakened team, who must beat Wales to claim the runners-up spot and reach the quarter-finals.

"I'm proud with the players we put in, knowing that it would be tough, but we had chances late in the first half, but things didn't turn out for us," he said.

"I'm pleased with the way the younger players came through, knowing that it is a tougher game for us against Wales next week.

"We are looking to have more control in the game, we gave away a lot of penalties especially in the line-out in Australia territory and in the scrum as well.

"We want to work on our defence too and improve our up-front tackling."