Williams has already missed two matches owing to the ban, the deciding Lions test and the Blues' Super Rugby loss to the Sunwolves in Tokyo last weekend.
All Blacks coach Steve Hansen told Radio Sport on Thursday that Williams will miss a Counties Manukau pre-season game and potentially a club match to serve out the ban handed down for the red card offence.
Hansen said the club game was a bit contentious over whether it qualified for the ban.
