Hossain, who returned figures of 4-46, was ably supported by fellow paceman Mustafizur Rahman (2-29) as the hosts hurt Sri Lanka with regular strikes after they elected to bat first.
Upul Tharanga top-scored with 56 off 99 balls while skipper Dinesh Chandimal added 45. Wicketkeeper-batsman Niroshan Dickwella also contributed with 42.
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