Australia's Karrie Webb climbed to the top of the Handa Women's Australian Open leaderboard on Saturday in Melbourne.

Webb had a bogey-free three under 70 at the Commonwealth Golf Club to move to six under overall and assume the lead from overnight leader Giulia Sergas of Italy, who shot a two over 75.

Defending champion Laura Davies of England carded a two under third round 71 to lie two strokes behind.

Webb's fellow Australian Katherine Hull is alone in fourth one shot further back, while Chinese Taipei's Yani Tseng and South Korea's Yang Soo-jin were tied for fifth on two under with one round remaining.

Stacy Lewis, Azahara Munoz Guijarro, Anna Nordqvist and Melissa Reid were tied for seventh a further stroke behind.