Top-ranked amateur Lydia Ko captured her third win in a professional tournament on Sunday when she took out her home championships, the 54-hole New Zealand Women's Golf Open by one stroke.

In an outstanding 13-month spell, the world's No.1 amateur has now won the New South Wales Open to become the youngest player, male or female, to win a professional event,  the Canadian Open to become the youngest-ever winner on the LPGA Tour, and now a professional victory at home.

The 15-year-old Korean-born New Zealander approached the last hole in a tie for the lead at 10-under par with American Amelia Lewis. But Lewis, in the penultimate group, three-putted from 25 feet for bogey and Ko, playing in the last group, made par to complete a final round 68.

(AP)