Louis Oosthuizen has given himself a great chance of winning the Perth International after hitting a 64 in his second round.
The South African produced an eight-under round at Lake Karrinyup Country Club to prove his class.
He moved to 10-under at the halfway stage, just one off the lead shared by Peter Uihlein and Brett Rumford who carded rounds of 68 and 65 respectively.
Oosthuizen could have drawn level with the duo on the final hole but he missed a short birdie putt.
Speaking after his round, the 2010 Open champion said: "I just over-read it. It was the first real putt I had in the shadows today. I took my glasses off, and I misread it a little bit. It's not going to bother me though."
Home favourite Rhein Gibson is in fourth place on nine under after a 68, with his compatriot Jason Scrivener (67) one shot further back in fifth place.
Frenchman Alexander Levy is the leading European player in the field, sitting sixth on seven under.
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