Experienced All Blacks game-breaker Beauden Barrett says fixing their discipline starts with the individual.

This is after the All Blacks recorded two consecutive defeats for the first time since 2011.

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The All Blacks can still win the Tri-Nations trophy if they beat Argentina this Saturday.

Barrett says that can only happen if players start taking a good, long look in their mirror.

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Argentina is an only undefeated team in the Tri-Nations.

They beat the All Blacks 25-15 and drew 15-all with the Wallabies.

The Tri-Nations rematch between the All Blacks and Argentina is at 8.45pm Saturday.