Rugby World Cup: Black Ferns coach Wayne Smith not worried by early set-piece struggles before Scotland match

Black Ferns coach Wayne Smith is unfazed by his team's set-piece woes in the Rugby World Cup so far, with the side determined to maintain their attacking attitude.

Despite two huge victories over Australia and Wales in their opening pool matches, New Zealand have struggled at the scrum and lineout, particularly against the Welsh.

The Black Ferns have made no secret of their intent to run teams off their feet, but their ability to defend the rolling maul has caused concern, especially with a likely match-up against tournament favorites England, or France in the semi-final.

New Zealand's final test before the knockouts will be against Scotland - another team known for a strong lineout drive.

But Smith believes his coaching staff of Sir Graham Henry, Mike Cron, Wes Clarke and Whitney Hansen have a plan in place to defend the rolling maul.

"We're going to try and get a 16th person on the field," he joked. "Look, I'm really fortunate, we have some of the best coaches in the world helping us here.

"We've got Mike Cron, who I think is the best forward coach in the world - not just forward coach, he's a great coach. We've got Ted [Henry], who I absolutely loved working with from 2004 on, he's full of wisdom.

"Wes Clarke is going to be an outstanding coach, he's going to headhunted around the world I reckon - he's outstanding. Whitney is the same, I am really fortunate. 

"They know where we stand, they're not silly, they know we struggled in the scrum and lineout maul the other day.

"So, of course there will be a lot of work put into it, but we just have to be careful we don't put everything in one basket, because we've got a certain game and have to maintain that attacking attitude, whilst fixing up this other stuff."

Smith has again rotated his team for the clash against Scotland, as he still tries to figure out his best match-day squad.

He admits he could make changes for every game right up until the final - should they qualify, but is confident in whoever he calls upon to step in and perform.

"I think it's more the 23 for us," Smith added. "You see the way we play, we try to run teams off their feet but we don't want to run ourselves off our feet.

"We have to have 23 players who can all front in a final, quarter-final, semi-final, whatever playoff game.

"I think we've got more than 23, it's not easy and possibly there won't even be a settled 23 through the playoffs, depending how far we go of course.

"I'm really happy with what we've got and I never fret if we get an injury, because I know we got someone else who is going to step in and do the business, I'm pretty comfortable with where we're at there."

Catch the Rugby World Cup live on Spark Sport or free-to-air on Three, or join Newshub at 4:45pm Saturday for live updates of the Black Ferns v Scotland pool encounter