The in-form Adam Scott has a four-shot lead after three rounds of the Australian Masters after firing a second successive 66 at Royal Melbourne.
The Aussie triumphed in the Australian PGA Championship last week and is now firmly on course for back-to-back wins in this event.
Scott began the day tied for the lead with Nathan Holman but pulled clear with a high-class outward nine, which he kicked off with a birdie three at the first.
He added a two at the par-three fifth and then made a trio of birdie threes in a row from the seventh to reach the turn in five under.
Consecutive bogeys at 11 and 12 slowed Scott but he got back on track with a birdie at the par-five 15th and picked up another shot at 17 to finish the day on 14-under-par.
There is a four-way tie for second involving Scott's fellow Aussies Holman (70), Matthew Griffin (69) and Nick Cullen (69), plus veteran Fijian Vijay Singh, who fired a brilliant, round-of-the-day 63.
Singh on song
The 50-year-old birdied four of his first five holes and recovered a dropped shot at nine with a birdie at 10.
And Singh then produced a birdie-eagle-birdie run from the 14th to charge up the leaderboard.
"I played really well," said Singh. "I mean, the first nine holes were incredible, I thought I could have birdied every hole.
"I made a very long putt, or a pretty good putt, on 10, which kind of gave me momentum again and then I played pretty solid from there in.
"I didn't play any different than I did the first two days, I just managed my game much better."
American World No 8 Matt Kuchar is a shot behind the group in second after a round of 67.
A day after birdieing five of his first six holes, Kuchar again got off to a superb start, picking up shots at four holes in a row from the second.
However, again he slightly undid his early good work, matching two birdies with two bogeys over the rest of his round, one of the dropped shots coming at the last.