The greatest surprise today and of the week was the defeat of the World Number one Amateur Lydia Ko by Victorian Jo Charlton by a margin of 2&1. Ko, the defending champion, the US Amateur Champion and joint medallist in the qualifying rounds, easily won her opening round match yesterday but in the glorious uncertainty of 18 hole match play at this level she succumbed to a player who she had defeated by 15 shots in qualifying.
In the men's side of the championship New Zealander Sam An is the leading remaining qualifier after he progressed through both of today's rounds, defeating Ryan Ruffles in this afternoon's Round of 16.
With the leading two qualifiers, Brady Watt and Todd Sinnott, knocked out yesterday and 3rd qualifier Nathan Kimsey eliminated this morning then An, as the 4th qualifier on Wednesday, is the only top four qualifier to play the Quarter Finals tomorrow morning.
Australia's leading ranked amateur, Cameron Smith, defeated South Australian Anthony Murdaca 3&1 and remains on track to add the Australian Amateur Championship to his 2011 Australian Strokeplay Championship.
Viraat Badhwar, who won the Master of the Amateurs last week, was defeated in the morning round by Murdaca.
Other afternoon results amongst the men had Queenslander Damien Jordan, a former two time Iraq Tour of Duty infantryman, defeating Dale Williamson of New South Wales, New Zealander Blair Riordan defeating West Australia's Michael Dennis, Neil Raymond (UK) remains as the only non Australasian in the field following his win over Queenslander Sam Daley, Aaron Wilkin from Queensland defeating Dale Brandt Richards of NSW, Dylan Perry of the Hunter Valley over Germany's Alexander Matlari and George Drakeford of Victoria defeating Tyler Hodge of New Zealand.
US Junior Champion, Minjee Lee, remains as the leading qualifier still in the women's field after her narrow extra time win over Cathleen Santoso.
Lee takes on Japan's Kotone Hori in tomorow's morning quarter finals.