Sonny Bill Williams is in a race against time to be fit for the All Blacks as he recovers from a shoulder issue.
Blues coach Tana Umaga revealed after the Blues' first home win of the season against the Reds last night that Williams could be a touch and go for the All Blacks' first test against Australia in August.
The 32-year-old second five-eighth has struggled with injuries this season, his latest being an AC-joint injury he picked up in the All Blacks' third test against France last week.
However, All Blacks coach Steve Hansen said he isn't concerned about Williams' fitness and durability.
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"I think he's durable enough," Hansen told Stuff.
"He's just not having any luck at the moment; he's a bit like [Daniel] Carter.
"They're not muscle injuries, they're impact injuries so that'll turn. He's fine, we're very happy with where he's at."
Meanwhile, Williams announced yesterday that he has become a dad for the third time - with the arrival of his son Zaid Williams.
The All Blacks take on the Wallabies in the first Bledisloe Cup test of the year in Sydney on August 18.