All Black Keven Mealamu has been banned for four weeks for headbutting the England captain during Saturday's test match at Twickenham.
The New Zealand hooker's European tour may be over after he appeared to hit Lewis Moody in the back of the head while the players scrambled for the ball in a ruck.
The All Blacks won the London match 26-16.
Mealamu appeared before a judicial hearing in Scotland on Tuesday and has 48 hours to appeal against the decision.
The All Blacks face Scotland on Saturday and play Ireland and Wales in their bid for a grand slam.