Graham Rowntree has told England to expect the unexpected from "canny" Australia at Twickenham this weekend.
Northampton drew level with Saracens at the top of the Aviva Premiership table after a 33-14 victory over Sale.
Northampton director of rugby Jim Mallinder was pleased to see George North score his first try for the club.
Northampton play host to Sale on Friday in a meeting of two teams with early positive Aviva Premiership records.
A late penalty from the boot of Billy Twelvetrees handed Gloucester a dramatic 26-24 victory against Northampton.
Northampton boss Jim Mallinder thought two late refereeing decisions cost his side in their dramatic loss at Gloucester.
Leicester Tigers will welcome back Toby Flood, Ben Youngs and Manu Tuilagi for Saturday's fixture against Newcastle.
Northampton inflicted a first defeat of the season on Harlequins as they ground out an ugly 13-6 triumph.
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