New Zealand blew Australia off the field in an extraordinary first-half display in Sydney as they claimed a 13th successive win against the Wallabies and completed a 2-0 Bledisloe Cup clean sweep.

The annual series had already gone New Zealand’s way for a 24th successive year at Eden Park last weekend, but Australia did enough in a highly competitive first half in Auckland to suggest they could give the All Blacks a game on their home turf. And in a breathless opening six minutes in Sydney, it looked as if they might.

The ball-in-play time during that opening spell was incredible as both teams committed to fast, attacking rugby, offloading from everywhere.…