West Australian Brody Ninyette has opened up a one-shot lead early in his final round at the $US2 million ($A2.08 million) Perth International at Lake Karrinyup.

Ninyette sits at nine-under after one hole on Sunday, with England’s Ross Fisher just one stroke further behind.

Australians Brett Rumford and Jason Scrivener are lurking at seven-under, while Dimitrios Papadatos, JB Hansen, James Nitties and Danny Willett are at six-under.

Korean Jin Jeong dropped two shots early on Sunday to move to five-under.

World No.21 Dustin Johnson has picked up three shots through six holes in his fourth round, but he’s still eight shots off the pace after a disappointing three-over 75 on Saturday.

Rising South African star Branden Grace has recorded five bogeys in his first eight holes to slump to two-over.

Ninyette would secure a two-year exemption for the European Tour if he holds on for victory.