The home skipper's 4-15 included two scalps on his final two deliveries and Sri Lanka cruised to a nine-wicket victory inside 11 overs.

"No matter how well you bat or bowl, if you don't field well then you'll struggle to make it to the side. Fielding is non-negotiable," Wanindu Hasaranga said.

Hasaranga's fourth five-wicket haul is a new record for R. Premadasa Stadium, eclipsing Angelo Mathews' 6-20 against India in 2009.

The vice-captain's third ODI hundred, with nine boundaries, helped the hosts keep a formidable total after several batters threw away their wickets early.