As side stands on verge of history, set-piece is in dire need of fix.
So dominant and seemingly indestructible all year, the All Blacks have arrived in France with signs there may be a significant crack in their game.
They look vulnerable in the scrum, having been moderate all year and alarmingly out of sorts against Japan until their superior bulk and fitness eventually told in the final quarter.
The All Blacks are concerned - knowing as they do that while French flair is a myth, their devotion to and excellence in the set-piece is not. The old adage of no scrum, no win, still holds true in France.
Scrummaging is the lifeblood of the French team: if they get it right, build ascendancy, then the confidence will flow through their team. However good the All Blacks are at pass and run, their ability to win in Paris will be greatly reduced if they deliver a scrummaging performance similar to the one in Tokyo.