The key for Williams will be to harness the frustration he has felt since being banned for four matches following his high tackle on Anthony Watson at Westpac Stadium. He said today he wouldn't second-guess himself in terms of his tackling technique but he will have to be a little cautious.
"It was just a misjudgement," Williams said of his hit on Watson. "I got the tackle wrong. I certainly didn't try to shoulder his head on purpose. I tried to be physical but I just stuffed up the tackle.
"I've refreshed," he said of his time away which included a trip to Fiji with his family. "I've seen a bit of footy - I've seen Crotty and the boys do their thing with the Crusaders which I was pretty happy about. But now it's time to gear up for one of the biggest games for us this year.
"Sometimes you can be a little bit too eager and you have to try to keep a lid on things but hopefully I'll explode on Saturday."
In Crotty, Williams should have the ideal calming influence outside him. The Crusaders player, in good nick all season, was devastated to miss the final two Lions tests through injury but once again showed his class when he returned to the Super Rugby playoffs and helped Scott Robertson's side to their eighth title.
While Crotty spent most of his time in the No12 jersey for the Crusaders, allowing rising talent Jack Goodhue to play outside him at centre, he can play either position equally well and brings an organisation on defence which the All Blacks probably haven't had since Conrad Smith.
Against the All Blacks midfield will be Kurtley Beale, who hasn't played since May due to a torn hamstring playing for London club Wasps and whose most recent test was the Wallabies' defeat to the All Blacks in the final of the last World Cup, and Samu Kerevi.
The Wallabies should expect the All Blacks to exert pressure in this area and in Williams and Crotty the visitors have a dynamic duo ready to make up for lost time.