Luke Braid is another concussion casualty for the Blues and will miss Saturday's match against the Highlanders in Dunedin.
Braid suffered the injury during the 16-14 victory over the Brumbies at Eden Park last weekend and, worryingly for the flanker and the Blues, it is his second such problem of the season.
In his first case, the 26-year-old, who will leave to take up a contract at Bordeaux at season's end, was knocked unconscious in the defeat to the Hurricanes in Palmerston North last month when lock James Broadhurst kneed him in the head, an act which earned Broadhurst a one-week ban.
Before Braid was forced from the field last Friday against the Brumbies, he, Brendon O'Connor and Jerome Kaino formed a mobile and effective loose forward trio in the Blues' first victory of the season.
They did well to counter the turnover threat of David Pocock until the second half when the Wallabies openside came into his own. Pocock secured four turnovers in total compared with Kaino's two and Braid's one.