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.
Gloucester prop Nick Wood has been banned for eight weeks for stamping on Saracens' Jacques Burger.
Jacques Burger says he hopes Nick Wood is not banned for too long despite being stamped on by the Gloucester prop.
Saracens took advantage of Nick Wood's dismissal to claim a 44-12 victory over Gloucester at Allianz Park.
Gloucester prop Nick Wood apologised to his team-mates after early red card helped Saracens to an easy 44-12 victory.
England centre Brad Barritt will miss the autumn internationals after undergoing foot surgery.
Round two of the Premiership campaign rounds off on Sunday as Gloucester travel to the Allianz Park to face Saracens.
Saracens sent out a warning to the rest of the Aviva Premiership with a 42-20 thrashing of London Irish at Twickenham.
Saracens director Mark McCall saluted the efforts of Mako and Billy Vunipola in the 42-20 victory over London Irish.
Saracens chairman Nigel Wray insists English clubs are fully prepared to withdraw from next season's Heineken Cup.
Aviva Premiership returns with five fixtures across Saturday and Sunday as Leicester Tigers begin their title defence.
Alex Goode insists the disappointment of two straight play-off semi-final defeats will drive Saracens this term.
Saracens academy star Nathan Earle is relishing the opportunity to prove his credentials alongside the senior squad.