Fifteen-year-old Lydia Ko follows up New Zealand win with third place in Australian Open behind Jiyai Shin Ko followed up her victory at the New Zealand Women's Open in Christchurch by finishing behind South Korea's world No 8 Jiyai Shin. Ko, a New Zealander born in South Korea, recorded 63 in her opening round at the Royal Canberra Golf Club and the amateur went into the final day tied with Shin on 17 under. Shin took an early lead in the final round after Ko began the day with a double bogey on the first hole and a bogey on the second, allowing Shin to build an advantage. Ko fought back with three birdies to level with Shin, but faded in the back stages to finish 14-under, also letting world No 1 Tseng Yani move into second place with six birdies and an eagle putting her at 16-under. "Third in a professional event is a pretty good result and I can't say I'm not fully pleased," Ko said. I had a few struggles with my drives but I can't play good every single round. I always think putting is the biggest part of the game and also the psychology part, so those are the two things I would like to build up. Ko's display earned praise from Tiger Woods's former caddie Steve Williams. "It's really hard to fathom," said Williams of Ko's development. To be that good, that young, and that composed at that age is incredible. Ko suggested she may wait two years before giving up her amateur status, but Williams said she should turn professional sooner. "I don't know the rules and regulations of the LPGA tour and I don't know what her philosophy and thoughts are right now and what her parents have planned for her but whatever plan they had she has probably exceeded their expectations in every single manner," Williams said. There is no negative on going pro in my mind. There is nothing I can think of to suggest she shouldn't play the LPGA Tour. These days she could continue to study while playing. Let's face it she already plays a schedule where she misses plenty of school. In January 2012, Ko became the youngest player - male or female - to win a professional event with her victory at the New South Wales Open and was the youngest winner on the LPGA Tour when she triumphed at the Canadian Open. Ko's victory in Canada last August meant she beat American Lexi Thompson's record by winning at the age of just 15 years, four months and two days.