Zac Guildford out of Rugby World Cup quarterfinal

All Blacks and Magpies wing Zac Guildford has been ruled out of playing against Argentina on Sunday with a hamstring injury.

Guildford made his only Rugby World Cup appearance last Sunday, scoring four tries against Canada.  

Meanwhile All Blacks assistant coach Steve Hansen allayed fears captain Richie McCaw will miss any World Cup games because of his foot injury, saying he will play out the remainder of New Zealand's involvement in the tournament.

McCaw has been struggling with a foot injury for much of 2011 and was withdrawn from the team to play Canada in the weekend. But Hansen emphasised this morning it was decided not to risk McCaw with bigger games ahead and, while they would manage McCaw's load for the rest of the tournament, he would play. He missed the game against Japan with a calf injury.

McCaw has been running in running shoes for the early part of the week to maintain his fitness.

Prop Tony Woodcock is recovering well from the head knock he picked up last weekend and should be fit to play.