The pace bowler has taken 309 wickets in 71 five-day games with an impressive average.
Australia's chief selector Bailey has declared that skipper Cummins will be a central figure in this winter's Ashes series.
There were concerns that the 32-year-old might miss the series due to a ongoing back issue that was still troubling him.
Earlier indications from the squad suggested no definitive call had been made regarding whether he would play, with the Test matches kicking off on 21 November in the WACA.
He revealed that the captain is progressing and was "optimistic" about the likelihood of being involved.
"It's clear that the window is narrowing and multiple considerations at play, not just the physical problem, but additional elements," he commented.
"It's positive. There's strong faith that he will feature a significant role. With luck it's the first Test. Otherwise, we'll reassess."
Past Concerns
He was sidelined the ODI and T20 games against both Asian and Trans-Tasman rivals last month after medical tests showed a lumbar bone stress.
He has a history of back injuries, with setbacks in multiple past seasons forcing him out of several home seasons in a limited period.
Cummins stated he would be bold in recovery efforts in his rehabilitation process to make the squad for the Ashes.
Bailey noted that it was unclear if Cummins had begun bowling as part of his rehabilitation but acknowledged it was "becoming urgent" for him to regain fitness for the initial match.
Alternative Arrangements
If he's unavailable, ex-skipper Smith will take over the captaincy.
Versatile player Green was withdrawn recently from the ODI lineup for their ODI contests against the subcontinent side as a preventive step because of discomfort in his torso.
He labeled it as a "small issue and confirmed that he'll feature in the state-level matches, so will be "ideally positioned to resume bowling."
"Extensive planning has gone into developing the strategy for him to take part for the opening match as an batting and bowling option," he elaborated.
"He was only going to play the initial matches in any case. The way he swings the cricket bat in white-ball cricket, if it causes any delay for a short period, we just made the decision to approach this more conservatively."
Fixture Details
The Historic Rivalry
21 November 2025 - 7 January 2026
