Lydia Ko will take a one-stroke lead into the final round of the New Zealand Women's Open after shooting a 5-under 67 Saturday.

The South Korean-born New Zealander, who is defending her national title, started the day in a tie for fifth after an opening 69. On Saturday, she had six birdies and a bogey which moved her one shot ahead of Justine Dreher of France, who shot 70.

The 18-year-old Ko has a 36-hole total of 8-under 136 at Clearwater Golf Club in the 54-hole tournament co-sanctioned by the European Ladies Tour and Australian Ladies PGA.

Dreher is a shot ahead of Pamela Pretswell (70) of Scotland and Denmark's Emily Kristine Pedersen (66) and Nanna Koerstz Madsen (68), who are two strokes behind and tied for third.