For the All Blacks, taking David Pocock out of the game is as much about using their brains as their brawn.
The Wallabies No8, at his destructive best against Argentina in his side's 29-15 semifinal victory at Twickenham with four breakdown turnovers, poses a major threat to the All Blacks' ability to go back-to-back as world champions.
The All Blacks have been here before, however. Ahead of their semifinal victory over the Aussies four years ago, Pocock was identified as a major threat and was largely nullified by an awe-inspiring performance from the All Blacks' pack, who ran at him all day. It's hard to get a turnover when you're at the bottom of a ruck.
And while he and Michael Hooper have grown into a formidable partnership recently - they combined brilliantly in their team's victory over the All Blacks in Sydney in August before coach Michael Cheika surprisingly left Pocock on the bench for his team's return loss at Eden Park, a defeat which put the Bledisloe Cup back in the hands of the All Blacks - the same rules apply.
The All Blacks will have a strategy but much depends on simple common sense. Don't carry the ball straight into defenders, don't get isolated, and don't attempt an expansive game when deep in your own territory. In other words, try not to fall into the trap the Pumas did.