Australia dominated day two of the second Ashes Test on Friday with a punishing batting assault on a lifeless Gabba pitch as England fumbled their chances in the field.
Usman Khawaja said the black armband he wore in the first Test against Pakistan was for a "personal bereavement".
The second Test hangs in the balance after West Indies speedster Jayden Seales dismissed Australia's openers in a damaging late spell on Day 2 of the second Test.
Usman Khawaja smashed the first century by an Australia batter in the current series against India to steer the tourists to 255/4 after the opening day of the fourth and final Test.
Smith dislocated his right little finger in last month's World Test Championship final and will be required to wear a splint for five weeks, Cricket Australia said.
Khawaja is part of the Australia team on their first tour of Pakistan in 24 years.
Batting under lights on a lively track, Australia then suffered a collapse of their own and finished day two on 99-6 for an overall lead of 181 as they look to complete a series sweep.
Khawaja scored back-to-back centuries at the Sydney Cricket Ground in a stunning return after more than two years out of the Test side.
Former captain Tim Paine has been appointed coach of the Australia 'A' team for this season with the country approaching a transition to a new generation of players as a handful of Test stalwarts near retirement.
Usman Khawaja hit an unbeaten century to give Australia the upper hand on Day 1 of the fourth and final Test against India in Ahmedabad on Thursday.
England have not won an Ashes Test match in Australia for nearly 15 years but their batting firepower could prove decisive in the series starting in Perth next month, according to former captain Alastair Cook.
Usman Khawaja celebrated his recall to the Test arena after two years in the wilderness with a stylish 137 to drive Australia to a declaration on 416 for eight shortly before the close of play on the second day of the fourth Ashes Test on Thursday.
Australia must avoid defeat in Melbourne to keep their hopes alive of taking back the Border-Gavaskar Trophy.
'I don't see an end date with the way he's training, the way he's preparing, the way he's moving.'
Australia took the upper hand in the World Test Championship final against South Africa at Lord's, ending day two on 144-8 in their second innings with a lead of 218 runs after wickets tumbled freely again on Thursday.
The visitors, who are 2-0 behind in the four-Test series for the Border-Gavaskar Trophy, finished the frenetic opening day 47 runs ahead with six wickets in hand.
Khawaja to battle Head for openers' spot as Australia name squad for first two Tests.
Michael Clarke feels the Australian selectors have erred by dropping Nathan McSweeney mid-series against India
Khawaja suffers injury scare in warm-up game against Sri Lanka
Australian middle-order batsman, Usman Khawaja received an Ashes berth, and, opener Phillip Hughes was also lucky to retain his spot in the squad, after a poor performance in India.
Australia cricketer Usman Khawaja on Saturday appealed to people from every sphere of life to tackle the COVID-19 pandemic with all the seriousness. He was among the many cricketers to have expressed their concerns over the current crisis.
The brother of Australian cricketer Usman Khawaja has been taken into custody by counter-terrorism police
Returning to the bowling crease would mark the final stage of Green's carefully looked-after return to cricket after a spinal fusion operation in Christchurch.
Nathan McSweeney, who opened in the first three Tests with little success, has been dropped.
Usman Khawaja's fairytale comeback has presented Australia with a selection headache, and captain Pat Cummins conceded it would be hard to drop the in-form batsman from the fifth and final Ashes test against England in Hobart next week.
In-form batsman Usman Khawaja should be part of Australia's World Cup plans despite the imminent returns of Steve Smith and David Warner, former captain Ricky Ponting has said.
Virat Kohli fell victim to a well-directed short ball from Josh Hazlewood.
The ICC has barred Usman Khawaja from displaying messages of equality and freedom
Despite the overcast conditions seemingly favouring the bowlers, the decision proved to be a gamble that didn't pay off immediately.
'Completely acted wrong': Kohli shock as star avoids ban for 'ridiculous' clash with Aussie teen'
Australia had South Africa reeling at 43-4 at the close on Wednesday after being put in to bat first and scoring 212.
Australia bowled out Sri Lanka for 231 in the hosts' second innings and then chased down the target of 75 losing the lone wicket of opener Travis Head.
Khawaja said he was still good with bat in his hand and that "age is just a number".
Uncapped New South Wales batsman Usman Khawaja was named on Tuesday in Australia's 14-man squad on Tuesday for next month's two-Testseries against Pakistan in Britain.
Australia's young opener Sam Konstas accepted responsibility for an on-field spat with Jasprit Bumrah on Day 1 of the Sydney Test.
West Indies' fearsome bowling attacks of old, Jayden Seales and Shamar Joseph tore through Australia on Wednesday
Australia's two-time World Cup winning captain Ricky Ponting says senior batsman Usman Khawaja was axed from the national team due to his inconsistency but he is not willing to write him off yet. The 33-year-old Khawaja was recently left out of the Australia's annual list of contracted players after he was dropped midway through last year's Ashes.
Hazlewood was initially named in the squad for South Africa, will also return home following the Test series. Xavier Bartlett has been drafted in as his replacement.
The 31-year-old was out of action since undergoing a surgery on a torn meniscus which he had sustained during their Test series against Pakistan in October in the UAE.
Usman Khawaja's marathon 160 and Alex Carey's career-best 93 helped Australia rack up 505 for eight against Pakistan on Day 2 of the second Test in Karachi on Sunday.