Malinga dismissed Colin Munro early after New Zealand opt to bat.

Guptill and Williamson scored 163 for the second wicket to lay the perfect launchpad.

Williamson was dismissed for 76 in the 31st over.

Guptill smashed his fourth ODI ton before falling for 138.

Jimmy Neesham smashed 47 off 13 - which included 34 in one over - as New Zealand ended with 371 for 7

Sri Lanka made a solid start with openers scoring 119 inside 18 overs.

However, both openers were dismissed in quick succession as Sri Lanka slipped to 126 for 2.

Kusal Mendis disappointed and was dismissed for 18.

Kusal Perera stroked a fine ton to keep Sri Lanka afloat.

Once Kusal Perera was dismissed, New Zealand wrapped things up quickly to seal a 45-run win.