Warren Gatland believes flak England are receiving could galvanise them

Talking after his side's 23-13 win over Fiji which sees them top Pool A, the Kiwi insisted he would be a neutral on the weekend despite being guaranteed a quarter final spot should England lose.

He said: "If we're being entirely selfish about our own destiny, then Australia can do us a big favour on Saturday.

"But it's a bit hard for a Kiwi to be jumping up and down cheering for the Aussies, so I think I'll be quite neutral.

"It's a final for them.

"Sometimes when your backs are against the wall and you're being criticised left, right and centre it can galvanise you as a team.

"For England they'll be thinking if they beat Australia they're through to the quarter finals.

"If England do win, it makes next weekend's game at Twickenham pretty exciting too."

After a five-day turnaround, Wales have more injury fears with Dan Biggar going down with cramp, Dan Lydiate suffering an injury to his eye socket and Matthew Morgan getting blurred vision from suspected exhaustion.

Biggar hasn't missed a kick all tournament and added another 13 to his personal tally, but his head coach wasn't overly enamoured with his fly-half's showing.

He said: " I thought his kicking was great, I don't think his all-round play was great.

"But I thought his kicking was good."

A try each from Gareth Davies and Scott Baldwin was enough for victory at the Millennium Stadium, but it wasn't all plain sailing.

The Welsh scrum once again showed signs of weaknesses having been picked off Saturday by Sussex's Joe Marler, and Gatland knows he has to address it before they face the Wallabies a week Saturday.

"They put us under a bit of pressure, but they put Australia under pressure as well," he said.

"We made some changes and it was much steadier in that second half, but they're a tough, good unit.

"They've got good players, but I thought we fixed things up quite well.

"The guys have been pretty tired, so I thought we played well in the first half.

"If we'd have scored early in the second half maybe the game would've opened up, but we didn't finish the chances we'd created.

"We didn't get much success from putting the ball in the air because they were pretty dominant in that area.

"But to me it was about winning the game.

"I thought it was a tough, physical encounter so I'm absolutely delighted with the win given the short turnaround.

"The players dug deep and they did that well today."

Gatland hailed his side's work in the lineout and in defence, but pointed at the breakdown as another area of weakness.

John Lacey's handling of the game in Cardiff was inconsistent, and the former All Black was quick to point out it wasn't all his players' failings in that department.

"I found there was a slightly different interpretation to last week where I thought Jerome Garces was absolutely outstanding in terms of what he delivered," he said.

"We need to have a look at ourselves and the breakdown with some of the frustrations we had in there."

Wales are now three from three in the group and Gatland said the good results are no coincidence.

He added: "We've worked very hard over the last couple of months.

"We've been to places both physically and mentally that we've never been before.

"It builds on character and team spirit when they've been through that.

"When you can do that as a side and you're not playing for yourself - you're playing for your team-mates, family, jersey and nation - they're the kinds of things that drive people on to want to perform and to want to be successful.

"It's not always been that way, but I think we've got a group of pretty special people here at the moment."

Wales may be able to call upon the services of Paul James next week.

Although a solid scrummager, he is predominantly a loose-head prop, and there is no shifting Gethin Jenkins from the one shirt after another solid performance.