Tiger Woods suffered a disappointing third round at the Australian Open, shooting a three-over round of 75 to trail leader John Senden by six shots.
The American, without a win in nearly two years and down at 58th in the world rankings, could not replicate the form which saw him lead at the halfway mark.
Woods bemoaned some poor putting, adding: "I played the par-fives awful and I made nothing."
Senden shot 63 to stand 12 under and leads compatriot Jason Day by one shot.
Woods, who began the day ahead by one stroke on nine under, said: "I got off to an awful start. On the first nine, the greens were way firmer and I played more break and left everything on the high side. Then I made a concerted effort on the back nine to hit low lines and left everything low.
"There are a few easy holes you need to take care of and I didn't do that."
Senden's blemish-free round included an eagle at the sixth and seven birdies.
The 2006 champion said: "I kicked off well with the birdie at five and holing at six and then tried to stay relaxed on the back nine.
"The course allows you to shape shots into the pins, the back nine especially gives you a chance - anything can happen on those par-fives."
Behind the leading pair, 1998 winner Greg Chalmers was proving Senden's point about the par-fives by taking advantage of all four among his seven birdies.
Nick O'Hern, meanwhile, birdied five out of seven from the fourth to stay in contention and capitalised with an eagle-birdie finish to move to nine under for the tournament.
That left him level with American Nick Watney, whose typically up-and-down 68 featured eight birdies and four bogeys.