Bangladesh skipper Mahmudullah Riyad won the toss and elected to bat against Papua New Guinea in their bid to reach the Super 12s of the Twenty20 World Cup on Thursday.
The Tigers remain unchanged from their previous win over Oman in Group B of the first round in Muscat.
"We have had a good chat, we have a good team and haven't played our best game yet."
Bangladesh will go through to the next round if they win and Scotland beat Oman in the day's second match. A loss though would then bring it down to net rate.
Papua New Guinea captain Assad Vala said they will play with a lot of freedom in what could be their final match of the tournament.
"Nothing to lose and we have a lot of freedom to give it everything," said Vala.
PNG have lost both their group matches and must win to have any hope of making it into the main event.
They have made two changes with Hiri Hiri and Damien Ravu included in the team.
Bangladesh: Mohammad Naim, Liton Das, Mahedi Hasan, Shakib Al Hasan, Nurul Hasan (wk), Afif Hossain, Mahmudullah Riyad (capt), Mushfiqur Rahim, Mohammad Saifuddin, Taskin Ahmed and Mustafizur Rahman.
Papua New Guinea: Lega Siaka, Assad Vala (capt), Charles Amini, Sese Bau, Simon Atai, Hiri Hiri, Norman Vanua, Kiplin Doriga (wk), Chad Soper, Kabua Morea and Damien Ravu.
Umpires: Kumar Dharmasena (SRI), Richard Kettleborough (ENG)
TV Umpire: Chris Gaffaney (NZL)
Match referee: Ranjan Madugalle (SRI)