Bangladesh's stand-in captain Towhid Hridoy chose to bat against Australia in the first T20I in Chattogram on Wednesday.
Hridoy was thrust into the leadership role for the first time in his international career after regular captain Litton Das was ruled out because of a muscle tear that he picked up while batting during the third ODI in Dhaka earlier this week.
Bangladesh have brought in Soumya Sarkar to bat in the top order, while Parvez Hossain Emon, himself recovering from an illness, will keep wicket in Litton's absence.
"Following a medical assessment, [Litton] has been diagnosed with a Grade 1 strain of the left calf muscle," Bangladesh physio Delowar Hossain said. "The injury is considered minor, and he is progressing well in his recovery. He will be unavailable for the first match.
"However, depending on his response to treatment and rehabilitation, he may be fit for the subsequent matches. We will continue to monitor his progress closely."
Mustafizur Rahman, who was rested for their last T20I series against New Zealand, is back, but Nahid Rana and Taskin Ahmed weren't picked in the playing XI. Making his debut is Abdul Gaffar Saqlain, who became Bangladesh's 93rd T20I player.
Australia have made three changes since their last game in the format, handing debuts to Nikhil Chaudhary and Joel Davies, apart from adding Spencer Johnson in the XI. They are without Travis Head, Cameron Green and Marcus Stoinis from the XI that played against Oman in the T20 World Cup earlier this year.
This is Australia's first match at this venue since a Test match in 2017.
Bangladesh: 1 Saif Hassan, 2 Tanzid Hasan, 3 Soumya Sarkar, 4 Parvez Hossain Emon (wk), 5 Tawhid Hridoy (capt), 6 Shamim Hossain, 7 Mahedi Hasan, 8 Abdul Gaffar Saqlain, 9 Rishad Hossain, 10 Shoriful Islam, 11 Mustafizur Rahman
Australia: 1 Mitchell Marsh (capt), 2 Josh Inglis (wk), 3 Cooper Connolly, 4 Matt Renshaw, 5 Tim David, 6 Nikhil Chaudhary, 7 Joel Davies, 8 Xavier Bartlett, 9 Nathan Ellis, 10 Adam Zampa, 11 Spencer Johnson
