Former England academy director Rod Marsh predicts that Australia's bowlers will focus on captain Michael Vaughan in the coming summer's Ashes series.
Marsh told BBC World Service: "Vaughan will be targeted, I'm sure, when the Australians get to England.
"He's proved that he can make good Test runs. However his record as a batsman since he's been captain has not been as good as it was previously."
Vaughan was world number one after England's Ashes tour of 2002-03.
Australian seamer Glenn McGrath named Vaughan as his target for that series but the Yorkshire batsman proved equal to the task on that occasion.
England may have lost the Ashes, by a significant margin of 4-1, but Vaughan hit 633 runs and chalked up three excellent centuries.
Now, however, he has slumped to a lowly 27th in the world rankings, and since being named England captain in the middle of 2003 he has hit just four centuries and averages 35.95 in that period.
Marsh, who played 96 Tests for Australia, said: "He'll want to improve on that, otherwise he won't be satisfied.
"And I imagine there would be no-one he would rather do that against than the Australians."
Australia begin the first of five Tests at Lord's on 21 July.