New Zealand wary of South Africa threat to Eden Park record

Robertson made three starting changes for Saturday's heavyweight Rugby Championship clash between the world's two top-ranked sides, in which star forward Ardie Savea will play his IOOth Test

- 

New Zealand coach Scott Robertson warned his players on Thursday they must 'clear their minds' if they are to match South Africa's physicality and extend a 50-Test unbeaten streak at Auckland's Eden Park.

Robertson made three starting changes for Saturday's heavyweight Rugby Championship clash between the world's two top-ranked sides, in which star forward Ardie Savea will play his 100th Test.

Springboks counterpart Rassie Erasmus unveiled four changes to his starting side, who beat Australia 30-22 in Cape Town last month, including the return from injury of Siya Kolisi in the back row but not as captain.

Erasmus said centre Jesse Kriel would retain the captaincy because double World Cup-winning skipper Kolisi's availability had been in doubt this week with a knee complaint.

"At that stage, Jesse had already been told he would be the captain, and it was only fair for us to keep things that way," Erasmus said.