Ashes - 100 Days to go for oldest rivalry in cricket to kickoff
Australia's captain, Pat Cummins, is expected to miss the first Ashes Test due to a back stress problem and could potentially be sidelined for the entire series.
Cummins has not played since July, and despite some improvement, his injury has not healed sufficiently for the opening match in Perth on 21 November.
In his absence, Steve Smith is anticipated to captain the side, with Scott Boland likely to replace Cummins in the bowling attack.
The loss of Cummins, who was Australia's leading wicket-taker in the last home Ashes series, is a significant blow to their chances of retaining the urn.
This development boosts England's hopes of winning the Ashes, although England legend Stuart Broad expressed a desire for Cummins to be fit and play.