Matt Jones – the 2015 champion – carded a three-under-par 68 to stretch his advantage heading into Sunday's final round.
While Matt Jones leads the Australian Open, Paul Casey and Louis Oosthuizen are in contention.
Cameron Davis, 22, overcame an eight-stroke deficit to reign supreme by one shot at 11 under overall on Sunday.
Jason Day has never won his home Open, but is in pole position to get his hands on the Stonehaven Cup on Sunday.
Jason Day is eyeing a "nice little end-of-year cap" at the Australian Open, but his compatriot Lucas Herbert leads by a shot.
Cameron Davis set the pace in his home Open, while Jordan Spieth is seven shots off the pace.