Adam Scott shot a 5-under 67 on Sunday to win the Australian Masters for his first victory of the year.
Scott had five birdies on the front nine and another on No. 18. He trailed Ian Poulter by one after three rounds.
Poulter bogeyed two par-5s in three holes on the back nine in the final round and missed a short par putt on 17. He shot a 72 and finished second, four strokes behind Scott.
Scott finished with a 72-hole total of 17-under 271 at Kingston Heath.
New Zealanders Gareth Paddison (68) and Mark Brown (69) tied for third, eight strokes behind.