Pat Cummins has taken 309 Test scalps in 71 appearances with an average of 22.10.
Australia's chief selector Bailey has confirmed that pace spearhead Cummins will have a crucial role in the forthcoming historic rivalry.
There were concerns that the veteran bowler might miss the series due to a persistent back stress problem that remained unresolved.
Earlier indications from the squad suggested no final decision had been made regarding Cummins' participation, with the five-Test series set to start on November 21 in Western Australia.
He revealed that Cummins is "building up" and was "optimistic" about his chances of being involved.
"We're aware that the clock is ticking and there are permutations at play, not only the physical problem, but other factors as well," the selector added.
"The outlook is good. [We are] really confident that he will feature a significant role. Hopefully it's the first Test. Otherwise, then we'll pick it up."
Injury History
Cummins was ruled out Australia's limited-overs series against India and New Zealand last month after examinations confirmed a stress reaction in his back.
There is a track record of recurring issues, with flare-ups in several earlier campaigns causing him to miss multiple domestic campaigns in a limited period.
The bowler mentioned he would be bold in recovery efforts in his comeback strategy to secure his spot for the Ashes.
The selector indicated that it was unclear if the captain had resumed bowling as part of his rehabilitation but acknowledged it was "pressing" for him to recover fully for the first Test.
Alternative Arrangements
In case of absence, ex-skipper Smith will assume leadership.
Versatile player Green was recently pulled out from Australia's squad for their ODI contests against the Asian giants as a preventive step because of soreness in his side.
Bailey described it as a "minor" injury and stated that he's scheduled to appear in the domestic first-class competition, so will be "ideally positioned to deliver overs."
"Considerable effort has gone into creating the schedule for him to take part for the initial game as an dual-role player," Bailey explained.
"His involvement was limited to the first two ODIs in any case. The way he swings the willow in shorter formats, if it causes any delay for 24 more hours, the choice was made to take a cautious route."
Match Calendar
The Historic Rivalry
Spanning from late 2025 to early 2026
