The midfielder is out of the next test against Australia at Eden Park and wing Rieko Ioane is also a big doubt due to a leg injury.
The collateral damage following the All Blacks' 31-13 victory over the Wallabies at Sydney's ANZ Stadium last night is relatively big, but coach Steve Hansen has more options than most and he's in a far better position than opposite Michael Cheika.
Crotty was knocked unconscious after a head clash with midfield partner Jack Goodhue early in the first half, with his replacement Anton Lienert-Brown making a big impact off the reserves bench. The Chiefs midfielder is an option to join Goodhue from the start at Eden Park, but Hansen also floated the idea of starting Hurricane Ngani Laumape.
