With Josh Hazlewood possibly out for the entire Ashes series, Australia will be needing a replacement for multiple Tests at the minimum.
Captain Pat Cummins missed the first Test through injury, but could return from the second contest - meaning that available spots for the Brisbane second Test are still in question.
Scott Boland and debutant Brendan Doggett got the nod to support veteran Mitchell Starc as Australia's front-line bowlers in Perth.
But who will be likely to play plenty of Ashes cricket throughout the summer?
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Josh Hazlewood injury: When will he return?
After it was initially publicised that Hazlewood's hamstring strain was minor - and he would only likely miss the first Test - it has since been revealed to be a much more serious injury.
Journalists Peter Lalor and Tom Morris both reported Hazelwood's hamstring issue could be tendon-related after recent scans suggested the injury was worse than first thought.
If the 34-year-old's hamstring injury has seen damage to his tendon, the veteran bowler could miss the entire five-Test Ashes series.
Who will replace Josh Hazlewood in the Australian Test team?
With Hazlewood and Cummins out of the first Test, Boland and Doggett joined Starc as Australia's three-pronged pace attack in Perth.
Hazlewood is definitely sidelined for the second Test in Brisbane - commencing December 4 - while Cummins has declared himself ' half a chance' to return.
If both miss the Brisbane Test, then it's highly likely Boland and Doggett will continue alongside Starc.
But if Cummins returns from injury, then Australian selectors will have an interesting decision to make between Boland and Doggett.
Scott Boland
The Victorian fast bowler would be hot favourite to remain in the team, if only one fast bowling position was available beside Cummins and Starc.
Boland has been the 'first back-up' fast bowler for a number of years now but has still played plenty of Test cricket due to injuries or players being rested.
During the Perth Test, Boland snared his 50th Test wicket in Australia - and has the best Test bowling average of any player to do it at 13.47.
Despite not taking a wicket and struggling as an opening bowler in the first innings, Boland snared four in the second innings, with his dismissals of Ben Duckett, Ollie Pope and Harry Brook taking England from 1/65 to 4/74.
Brendan Doggett
On debut in Perth, Doggett bowled impressively - getting two wickets in the first innings and and three in the second dig.
However, he could be the player unluckily squeezed out if Cummins returns for the Brisbane Test.
The South Australian's best chance of remaining in the team is hoping Cummins is ruled out the next Test and he gets an opportunity to dominate - putting himself ahead of Boland.
Mitchell Starc factor
There is also a chance Australia could rest Starc at points throughout the series, especially after his dominance in Perth.
Starc tore though England with seven wickets in the first innings and got three in the second dig for a match haul of 10.
With plenty of pressure on Starc's shoulders as the current leader of the pace attack, either Boland or Doggett could profit with another Test appearance if the star veteran is rested.