Off-spinner Nathan Lyon isn't surprised by Australia's stunning Ashes form turnaround, saying the signs were there even in defeat.
Just a few months ago Australia bombed 3-0 in the Ashes series in England to go seven successive tests without a victory.
But a win in the final test in Sydney starting Friday will put the current Australian team in a select group.
Only Ricky Ponting's 2006-07 team and Warwick Armstrong's 1920-21 champions have achieved a 5-0 clean sweep of the old enemy.
Lyon has mirrored the form reversal after being dropped twice during the year and finishing 2013 with five wickets in the Boxing Day Test, among them his 100th Test scalp.