Sonny Bill Williams of New Zealand powers through the Australia defence to score in the Bledisloe Cup.
Sonny Bill Williams of New Zealand powers through the Australia defence to score in the Bledisloe Cup. DAVID MOIR

Concussion concern for SBW following Bledisloe Cup clash

SANZAAR is investigating how All Blacks star Sonny Bill Williams suffered an apparent head knock in the opening Bledisloe Cup match and stayed on the field without being checked for concussion.

Footage of Williams suffering an apparent head knock in the second minute has circulated on social media since the game.

The Kiwi centre made a tackle on Wallabies lock Rory Arnold and subsequently had giant New Zealand lock Brodie Rettalick and Aussie rival Adam Coleman fall on him.

Williams appeared very unsteady on his feet when he got up and slowly made his way back to the Kiwi line.

Lack of balance is an indicator to medical staff of potential concussion but Williams was not sent for a HIA.

A SANZAAR spokesman confirmed it was looking into the matter after being made aware of footage via social media.

They will discuss Williams' case with the match-day doctor, who was appointed by the hosts and the ARU, as per SANZAAR regulations.

The All Blacks have been contacted for comment.

News Corp Australia

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