Henry plays his Jack

Chris Jack will play against Ireland after injury ruled out Ali Williams.

All Blacks coach Graham Henry on Tuesday names his test match squad for Saturday’s encounter in Hamilton and Williams was always favourite to start this test, with Jack rested until the one-off test against the Pumas in Buenos Aires.

But injury has forced a rethink and with South African-born lock Greg Rawlinson set for his test debut, the experience of Jack became essential.

Williams will now play against the Pumas with Jack to sit out that one.

Only a limited number of players who contested the Super 14 final were included in the test squad to play Ireland, as Henry felt they needed a break to prepare for the Tri Nations.

Richie McCaw, as captain, is there, but he will get time off against the Pumas, while the core of the side comes from the Chiefs, Blues and Highlanders — the three most disappointing New Zealand sides in the Super 14.

Ireland coach Eddie O’Sullivan said it did not matter which New Zealand team ran out, they would always be formidable. Late last year the All Blacks beat Wales by 40 points and changed the entire team to play Ireland. They led the Irish 45-0 until a last minute try gave Ireland seven points on the scoreboard.

O’Sullivan said the All Blacks Grand Slam success underlined the depth in New Zealand rugby and added that if he had the same amount of depth he would also follow a similar rotation policy.