Veteran opener Usman Khawaja included after back spasms prevented him from batting in the second innings of Perth's series opener.

Cummins missed the opening Test of the series in Perth with a back injury as the Aussies clinched an eight-wicket victory inside two days, but the

pacer has been given an extra two weeks to return to full fitness.

The 32-year-old, who is in the final stages of his recovery from lumbar back stress, will travel with the squad to Brisbane.

The absence of Cummins means that Brendan Doggett, who claimed five wickets in Perth, will likely retain his place alongside Mitchell Starc and Scott Boland.

Cummins trained strongly at the SCG on Friday, bowling at what appeared to be full speed to Steve Smith for more than an hour with a pink ball after getting through a similar session at NSW's Cricket Central headquarters on Tuesday, as per cricket.com.au.

The pacer was joined by Josh Hazlewood, who was also missed the Ashes opener after suffering a hamstring strain playing for NSW in the Sheffield Shield a week before the first Test, during his net sessions this week.

Cummins trained strongly at the SCG on Friday, bowling at what appeared to be full speed to Steve Smith for more than an hour with a pink ball after getting through a similar session at NSW's Cricket Central headquarters on Tuesday, as per cricket.com.au.

Australia squad for second Test: Steve Smith (c), Scott Boland, Alex Carey, Brendan Doggett, Cameron Green, Travis Head, Josh Inglis, Usman Khawaja, Marnus Labuschagne, Nathan Lyon, Michael Neser, Mitchell Starc, Jake Weatherald, Beau Webster