CHRISTCHURCH, New Zealand — Top-ranked amateur Lydia Ko won the New Zealand Women’s Open on Sunday for her third victory in a professional tournament.

In an outstanding 13-month spell, Ko — who’s just 15 years old — 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 tournament at home.