Barrett sees red for All Blacks in Australia Test

Scott Barrett could miss the start of the World Cup after becoming only the fourth New Zealand international ever to be sent off during a Test, with the lock receiving a red card in his nation's 47-26 loss to Australia in Perth Saturday.

French referee Jerome Garces deemed that Barrett had committed a dangerous tackle when he made contact with the head of Australia captain Michael Hooper with a no-arm tackle. The offence occurred at a ruck just before half-time.

Barrett has been charged with a dangerous tackle and will have his case heard by the SANZAAR foul play review committee late on Sunday afternoon (5pm AEST).

Barrett would need to plead guilty and accept the finding for the case to be decided by the foul play review committee, otherwise it will need to go to a judiciary hearing.

A six-week ban usually follows such a dismissal and Barrett will miss the second Bledisloe Cup Test against the Wallabies in Auckland next week, which the All Blacks must win to retain the trophy they have held since 2003.

All Blacks coach Steve Hansen said Barrett's dismissal had been costly, although he was more concerned about how many tackles his side had missed.

"It's not good enough when [in the] first half you miss 10 or 20 tackles out of 90, so we were not going well," he said.

"We were starting to get into the game and then, lack of discipline, we get a guy sent off and it's not a team you want to play with 14 against.

"We were just starting to come right defensively. You can't miss first-time tackles, it puts you on the back foot," Hansen continued.

"In the end, we missed a lot of tackles, but that's because of the simple fact that we only had 14 guys on the park and the guys were trying to do three jobs rather than just their own."

"All credit to Australia, good win," he said. "Having said that, I'm still proud of our boys. The way they stayed in there with 14 men -- they didn't lie down."

With Hansen on the record as saying the Bledisloe Cup is the second most important trophy for the All Blacks after the World Cup, the Wallabies could face quite a backlash at Eden Park next week.

"Lots can change in seven days," Hansen said. "Attitudes change, we probably won't have Scotty Barrett so we'll have to make some team changes, but we've just got to get our game going and play with a bit more confidence."

Hansen indicated Brodie Retallick could be a chance to return in Auckland, just a fortnight after he suffered a dislocated shoulder against the Springboks in Wellington.

The other All Blacks to be dismissed in Tests were Cyril Brownlie in 1924, Colin Meads in 1967 and Sonny Bill Williams two years ago. Garces was the referee when Williams received a red card for a shoulder charge during the second British and Irish Lions Test in 2017.