Sri Lanka had no answer to Najmul Hossain Shanto's career-best unbeaten 122 which powered Bangladesh to a six-wicket win in the first ODI in Chattogram. The home side won with 32 balls to spare despite losing three early wickets, as Shanto and Mushfiqur Rahim added 165 runs for an unbroken fifth-wicket stand.

Mushfiqur gave Shanto good support scoring his 49th half-century, allowing the Bangladesh captain to dominate Sri Lanka. The pair at one stage went through 60 deliveries without hitting a boundary but that didn't keep them from being ahead of the required rate.

Shanto struck the bulk of his boundaries in front of the wicket, with his best shot, a scorcher through the covers, helping him reach his second ODI century. He also hit the winning runs, lofting Maheesh Theekshana over the cover region.

Earlier, Bangladesh's trio of Tanzim Hasan Sakib, Shoriful Islam and Taskin Ahmed grabbed three wickets each, making it only the second time that Bangladesh fast bowlers have taken nine or more wickets in a home ODI. That Sri Lanka reached 255 was down to half-centuries from Janith Liyanage and captain Kusal Mendis after they gave away a good start by their openers.

Sri Lanka, however, fought back with the new ball. Litton Das was sent back first ball as he inside-edged Dilshan Madushanka onto his stumps. Soumya Sarkar fell in Madushanka's second over when he top-edged a simple catch straight to Theekshana at square leg. Pramod Madushan then joined the party, removing Towhid Hridoy's off-stump with a subtle outswinger as Bangladesh slipped to 23 for 3 in the sixth over.