New Zealand fly-half Dan Carter has been ruled out of the opening match of The Rugby Championship against Australia.
Carter suffered a calf injury in training on Tuesday, sidelining the all-time leading Test points scorer.
The news got even worse when it was revealed that Carter could be out for up to four weeks, putting his involvement against Argentina and South Africa in doubt.
"It's a bit frustrating, especially when the body feels good and then you have a wee setback like this,'' said Carter.
"So it's always frustrating but, the thing is, I've had injuries like this before so I know what I have to do to get back playing and play as well as I know I can.''
The 31-year-old, who announced earlier this month that he would be taking a six-month sabbatical after the November Internationals, will now be replaced by Chiefs fly-half Aaron Cruden with Beauden Barrett expected to be named amongst the replacements.
"The scans show it's not a biggie, it's something that's a nuisance more than anything else," said All Blacks head coach Hansen.
"[Cruden's] ready to rumble. He's also played a couple of Tests this year and understands what we're trying to do. He's part of the leadership group so it's business as usual."