New Zealand could be without second row Brodie Retallick for their final game of the Rugby Championship because of a head injury.
The lock has been one of the standout players for the All Blacks during the competition, which they wrapped up with a 34-13 win over Argentina in La Plata.
However he might miss Saturday’s clash with South Africa in Johannesburg because concerns over a knock to the head that he picked up against the Pumas.
“We will see how he comes through,” Hansen said after the game.
“If Brodie passes all the tests he will be fine and if he does not then he will not play against the Springboks.”