Rugby: Sonny Bill Williams in doubt for first Bledisloe Cup test against Australia

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.

"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.