Ben Smith's quality as a player and, as is becoming more evident, a leader, means the All Blacks don't start an important test without him if he is fit.
The All Blacks fullback and vice-captain played 12 of his team's 14 tests last year - he missed the end-of-year tour matches against Italy and France - and this second test against the British and Irish Lions will be the first significant one he has missed in a long time.
Coach Steve Hansen believes he is the best No15 in the world and so does his Lions counterpart Warren Gatland. A case could be made for Smith being the best wing in the world too when he plays there.
So in his absence in Wellington, various others will have to step up and make their voices heard. With men such as Sam Whitelock, Sam Cane, Aaron Smith and Beauden Barrett in the team that won't be too difficult. All possess special rugby intelligence and are excellent leaders in their own right.
The expected backlash from the Lions after their first-test failure will also serve to focus minds for the men in black at Westpac Stadium. It has the potential to be up several notches in intensity compared with last weekend and it will be important that Israel Dagg, Smith's replacement in the No15 jersey, offers skipper Kieran Read some insight from the back.