LEFT OUT: Sonny Bill Williams File Photo: Jacky Naegelen

The All Blacks have trimmed down their squad for the Bledisloe Cup and Rugby Championship opener against Australia, leaving injured centre Sonny Bill Williams and outside back Nehe Milner-Skudder at home.

The All Blacks departed for Sydney on Sunday in preparation for Saturday's match at Olympic Park, with hooker Dane Coles among the touring party despite a long lay-off from injury.

Ngani Laumape was called in as cover for Williams in the extended squad named last week.

Steve Hansen's side are bidding to extend their hold over the Bledisloe Cup, the annual series contested with Australia, for a 16th year and claim a third successive Rugby Championship trophy.