Skipper Steve Smith and Cricket Australia's power structure believe Warner will face England but they have opted to bring in Maxwell as a precaution.
Gloveman Tim Paine will play his first Test since 2010, while Cameron Bancroft will become Australia's 451st Test player when he receives his baggygreen before the start of play. The Victorian would be making his home Test debut in the event he was required at the Gabba. The left-hand batsman Shaun Marsh was selected in his place.
Opener Ed Cowan, last season's leading Shield run-scorer, is back following the exit of Steve Smith and David Warner, while Nick Larkin and O'Keefe also coming into the XI.
"He's very confident and he says he'll be right to go".
Maxwell will fly back to Sydney today to play for Victoria in their Sheffield Shield match against NSW and will be on standby to play a part later in the Ashes series. Guys have injuries every now and then and have little niggles.
"Shaun Marsh has obviously got a bit of history with back injuries".
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Most of those meals were delivered Thursday morning to those who called and ordered a meal by the November 17 deadline. And the fact the church does this makes you feel very appreciative".
But Beakley and chairman of selectors Trevor Hohns, both interested onlookers, appeared largely satisfied with proceedings.
Both sides have made numerous changes after losing players for the first Test of the Magellan Ashes.
He said: "It's disappointing for the England team and the country. So I think he'll be all right". "We'll still prepare the same and be absolutely ready for him to play".
Vice-captain David Warner hurt his neck while fielding during a practice session at the Gabba on Tuesday.
Interested onlookers Beakley and Hohns appeared somewhat satisfied.