Australia have one eye on India and Pakistan could be contemplating life without their most successful captain Misbahul Haq when the final 'dead' Test begins on Tuesday in Sydney.

Steve Smith's Australians wrapped up the three-match series with a Test to spare in a dramatic second innings demolition of Pakistan in two sessions in Melbourne on Friday to open up new selection possibilities for Sydney.

Shattered Pakistan could be forced to look for a new leader with 42-year-old Misbah admitting he was thinking about retirement, possibly even before the series concludes in Sydney.

"I always believed that if I couldn't contribute to the team then it's no point staying there. I haven't decided [about Sydney] but let's see," Misbah said after the tourists lost by an innings and 18 runs.

While the end looms for the man who has guided his country to more victories than any other Pakistan captain -- 24 in 52 Tests -- Australia have other considerations.

Spinners Steve O'Keefe and Ashton Agar have been included in a 13-man squad for a Sydney Cricket Ground wicket that is expected to turn.

Coach Darren Lehmann raised the prospect of playing two of his three spin options -- the other is off-spinner Nathan Lyon -- at the expense of paceman Jackson Bird with an all-rounder coming in.

Australia go to India for four Tests in February on likely turning pitches, putting the onus on O'Keefe and Agar to put in a good audition and stake a claim for a place on tour.

"It's more than likely that we're going to play two of those three spinners which means we'll also have to look to fit in an all-rounder," Lehmann said. "It might end up that someone like Jackson Bird could be the unlucky one who misses out, but that will depend on the condition of the SCG pitch."