Melbourne amateur Su-Hyun Oh is in a share of the lead with one round to play at the Australian Ladies Masters on the Gold Coast.
The 16-year-old carded an eight-under par 64 in her second round at the Royal Pines Resort, including an eagle at the par-five 18th, to move to 10 under the card.
She shares the lead with another youngster, 17-year-old Thai Ariya Jutanugarn, who shot a 65 and would have had the lead to herself but for a bogey at the 18th.
Australian Stacey Keating and Jessica Korda, daughter of former Australian Open tennis champion Petr Korda, are a shot further back in a tie for third on nine under.
South Korean Chella Choi and Australian Karrie Webb - a seven-time Masters champion - are within striking distance on eight under par.
Americans Dori Carter and Alison Walshe are level with Swede Pernilla Lindberg on seven under, with Thailand's Nontaya Srisawang is another stroke further adrift on six under.