Williams injury blow for Welsh
Williams suffered the injury just before half-time in last Saturday’s 29-25 defeat to South Africa at the Millennium Stadium and the prognosis now makes him a serious doubt for the start of Wales’ 2011 RBS 6 Nations campaign.
Wasps back-row forward Andy Powell has also been ruled out for this weekend’s match against New Zealand with a groin problem.
Meanwhile, Leicester centre Anthony Allen has been called into the England squad ahead of Saturday’s game against Samoa.