Graham Rowntree has told England to expect the unexpected from "canny" Australia at Twickenham this weekend.
Chris Ashton admits missing out on Lions selection has spurred him on to perform for Saracens and England.
Chris Ashton scored the only try as Saracens picked apart Aviva Premiership title rivals Harlequins 22-12 at the Stoop.
Saracens boss Mark McCall warned the end of the season is more important than the start after they stayed unbeaten.
Saracens will be aiming to stretch their lead at the top of the Aviva Premiership table when they take on Harlequins.
Saracens director of rugby Mark McCall called Chris Ashton "exceptional" after the winger helped blow away Bath 31-17.
Saracens maintained their perfect start to the new Aviva Premiership season with an easy 31-17 victory over Bath.
Alex Goode will start his first game of the season when Bath visit Saracens in Sunday's sole Aviva Premiership fixture.
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