Wales star in fitness race to face All Blacks
Williams suffered an injury in Saturday's 13-6 win over Georgia and Wales coach Warren Gatland admitted he wasn't sure of the back's status.
While Gatland is upbeat about Lions flank Justin Tipuric's prospects of being fit after a thigh injury, Williams could face a battle to recover in time for the New Zealand match in Cardiff.
"I'm not sure about Liam Williams. He is hobbling around," Gatland said when asked about injuries during his post-match press conference.
Williams would be integral to Gatland's plans of upsetting New Zealand after shining for the British and Irish Lions against the All Blacks.
New Zealand have won their last 29 meetings with Wales.