Australia wing Pat McCabe suffered a recurrence of his neck injury against New Zealand and is a doubt for the rest of the Rugby Championship.
The Brumby back was wearing a neck brace at Auckland airport and according to AAP, Ewen McKenzie said the scans show worrying signs.
In a further setback to the Wallaby cause, hooker Nathan Charles will join McCabe on the sidelines for their upcoming fixture against South Africa after suffering a rib injury in Saturday's 51-20 defeat.
The Reds' James Hanson is now poised for a start against the Boks on September 6 in Perth.
