Did McCaw strike Louw?
McCaw is looking straight ahead at the time of the incident as he chases Damian de Allende, who has the ball, around the back of a ruck.
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Louw is on one knee having just completed a turnover and fed the ball to de Allende as McCaw goes past.
New Zealand media have questioned whether the blow could lead to McCaw being cited ahead of next Saturday's World Cup Final when the All Blacks will play the winner of Sunday's clash between Argentina and Australia.
Louw said he required 16 stitches to his forehead and four more for another head wound.
When asked how he incurred the cuts, the flank said: "I'm not sure, I think it was at the bottom of a ruck".
Agence France-Presse
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