Sadeera Samarawickrama and Charith Asalanka made resolute fifties after Matheesha Pathirana's hostile bowling as Sri Lanka slayed Bangladesh by five wickets in their Asia Cup opener in Pallekele on Thursday. Pacer Pathirana's 4 for 32 restricted Bangladesh to 164. The home side then rode on Samarawickrama's 54 off 77 balls and Asalanka's unbeaten 62 off 92 balls to overhaul the target in 39 overs. Samarawickrama is going through a career rejuvenation this year after fading from the scene.