The All Blacks flanker, Sam Cane, has been told to stay at home as he recovers from a head knock suffered in the Chiefs' Super Rugby loss to the Hurricanes last weekend.
Cane was meant to join the All Blacks camp for the Rugby Championship this week, but he, Crusaders prop Joe Moody, and the Highlanders' All Blacks, have been given extra time to recover from the Super Rugby season.
Chiefs prop Carl Haymes has been called into the All Blacks camp as cover for Moody.
New Zealand's coach, Steve Hansen, said Cane is showing signs of concussion following his collision with TJ Perenara and will be monitored closely.
"We won't play him if there's any risk so doc will manage that process with Sam," he said.
"Sam will be given enough time to come right and when he comes right he'll be available for selection."
Hansen said when Cane comes right he is a presumptive pick for the squad.
He said he would not rush the Highlanders players back.
The All Blacks' first game is against Australia on August 20 in Sydney.