American Sandy Armour double-eagled the par-5 ninth hole en route to a 7-under-par 64 and the first-round lead in the Australian PGA.

Armour, the grandson of golf legend Tommy Armour and brother of PGA Tour player Tommy Armour III, holed his second shot on the ninth hole of the par-71 Riverside Oaks course to take a one-stroke lead over Australians Wayne Grady and Brett Ogle.