Teenagers Tamim Iqbal, Saqibul Hasan and Mushfiqur Rahim played key roles in Bangladesh's shock five-wicket victory over 1983 champions India in the previous game here on Saturday, slamming impressive half-centuries.
Just one win was enough to raise Bangladesh's hopes of qualifying for the next Super Eight stage from Group B.
In their last game, they will take on first-timers Bermuda who lost to Sri Lanka by 243 runs in their first match.
Sri Lanka have won 17 of their 18 one-day internationals against Bangladesh, but are not expected to have another stroll in the park this time considering their opponents' recent form.
Bangladesh are looking a different side since arriving in the Caribbean early this month, having stunned higher-ranked New Zealand in a warm-up game in Barbados and then India here.
"We haven't played against most of the Bangladeshi players, but we watched them against India and they looked very good," said veteran Sri Lankan opening batsman Marvan Atapattu.
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