Kevin Stadler emerged from his father's shadow to win the Johnnie Walker Classic at The Vines in Perth.

The 26-year-old American may not remember the 1982 Masters, which his father Craig Stadler won by beating Dan Pohl in a play-off, but he is unlikely to forget the past four days in a hurry.

Three bogeys on the front nine threatened to undermine his title bid, but an eagle on the 18th - for the third successive day - earned Stadler a two-shot victory over Australian Nick O'Hern.

A final round of 69 followed scores of 64, 69 and 66 to give Stadler a 20-under-par aggregate of 268.

His three-iron approach to the 514-yard par-five 18th left Stadler with a tap-in for the title.

"I don't know what happened there, it was obviously the best shot I hit all week," he said.

"It was a great week. Except for those three holes today in the middle there, I felt like I had total control of my game and (it was) just really enjoyable."

The world number 256 was lucky to even get a start in the tournament, having to rely on an invitation to the event.

"It was just a great stroke of luck that they let me into the event here," he added.

"It's just worked out for the best."

Ian Poulter finished sixth and rose to 19th on the European Tour Order of Merit, after a 69 today put him on 14-under.

Fellow Englishman Ross Fisher shot a 72 to finish 12-under, with Paul Casey one stroke further behind after his one-over par final day.

"I didn't play very good golf. It was as simple as that," said frustrated Casey.

"I just didn't play the golf I wanted to play."

Casey's 15th placing means he will remain fifth in the Order of Merit, while Fisher's performance lifts him 15 places to 29th.

Steve Webster finished nine-under overall, one stroke ahead of Ian Garbutt who picked up two strokes on the final day.

A host of Englishmen finished on seven-under, including Gary Emerson, Mark Foster, Sam Little and Oliver Wilson.

Scotland's Simon Yates had a terrific day with a six-under 66 to finish on the same mark, but countryman Stephen Gallacher tumbled down the ranks after his four-over 76 to finish five-under.

Local hero O'Hern was level with Stadler until the final hole and despite being happy with his closing 68, he was disappointed not to claim the top prize.

Stadler earned £210,000 - by far the biggest cheque of his career - while O'Hern took £140,000 as consolation.

"I got off to a good start and then ran into a brick wall as far as the scoring went," said O'Hern.

"It would be nice to take away the win, but I played my heart out today and I was really proud of the last four or five holes.

"I'm going to take a lot away from this week."

Australian Robert Allenby finished in a share of third place with compatriot Richard Green at 16-under.

Green endured a horrendous start, posting three bogeys from his first five holes before recovering well on the back nine with four birdies.

"I got a bit nervous and just let the bad thoughts come in unfortunately," Green said of his bad start.

"I didn't give up - I won a bit of a battle with myself."

KJ Choi was unable to mount a final-day challenge, the world number 36 finishing fifth at 15-under, one stroke ahead of Italian Francesco Molinari and defending champion Adam Scott.

"I had a good start but I just couldn't keep it going," said Choi.

"I missed a few putts for birdies from close range early on and I just couldn't read the putts at all."

Collated final-round scores (Gbr & Irl unless stated, par 72):

268 Kevin Stadler (USA) 64 69 66 69

270 Nick O'Hern (Aus) 67 71 64 68

272 Robert Allenby (Aus) 69 68 69 66, Richard Green (Aus) 66 69 66 71

273 KJ Choi (Kor) 65 66 70 72

274 Ian Poulter 70 66 69 69, Francesco Molinari (Ita) 71 65 66 72, Adam Scott (Aus) 64 71 70 69

275 Fred Couples (USA) 71 67 65 72, Gavin Flint (Aus) 72 64 66 73, David Diaz (Aus) 69 72 64 70

276 Chris Campbell (Aus) 71 67 67 71, Ross Fisher 69 67 68 72, Shiv Kapur (Ind) 68 71 67 70

277 Prayad Marksaeng (Tha) 72 66 70 69, Paul Casey 68 69 67 73, Andrew Buckle (Aus) 73 69 67 68

278 Craig Parry (Aus) 68 70 65 75, Man-Lee Sung (Kor) 71 71 64 72, Steve Allan (Aus) 72 69 67 70

279 Scott Gardiner (Aus) 70 66 74 69, Leigh McKechnie (Aus) 73 66 70 70, Steve Webster 71 68 68 72, Peter Senior (Aus) 68 68 72 71, Nick Flanagan (Aus) 72 68 66 73, Soren Kjeldsen (Den) 70 71 67 71, Peter O'Malley (Aus) 69 70 67 73, Stephen Leaney (Aus) 70 66 69 74, Kim Felton (Aus) 71 68 67 73

280 Angel Cabrera (Arg) 73 68 71 68, Tony Carolan (Aus) 66 69 75 70, Ian Garbutt 71 69 70 70

281 Simon Yates 72 70 73 66, Gary Emerson 70 70 71 70, Sam Little 70 71 70 70, Gary Simpson (Aus) 75 63 67 76, Oliver Wilson 72 68 66 75, Mark Foster

70 69 69 73

282 Jarrod Moseley (Aus) 71 70 73 68, Terry Pilkadaris (Aus) 68 72 72 70, Bradley Iles (Nzl) 68 74 67 73

283 Richard Finch 72 67 71 73, Marcus Fraser (Aus) 67 71 73 72, Stephen Gallacher 71 66 70 76, Raphael Jacquelin (Fra) 70 69 67 77, Paul Sheehan (Aus) 69 70 74 70

284 Cameron Percy (Aus) 71 70 72 71, Lucas Parsons (Aus) 69 73 71 71, Jean Van de Velde (Fra) 66 76 71 71, Peter Hanson (Swe) 73 69 70 72, Robert Karlsson (Swe) 72 69 69 74

285 Joakim Haeggman (Swe) 70 71 73 71, John Bickerton 72 69 70 74, Graeme Storm 74 68 71 72

286 Brett Rumford (Aus) 67 71 69 79, Ewan Porter (Aus) 67 74 69 76

287 Phillip Archer 72 70 70 75

288 Michael Long (Nzl) 73 69 73 73, Simon Wakefield 70 72 72 74

289 Maarten Lafeber (Ned) 73 69 75 72, Ter-Chang Wang (Tpe) 73 66 72 78, Mardan Mamat (Sin) 72 70 71 76, Anthony Wall 72 67 71 79

290 Andrew Marshall 70 69 76 75

291 Ryan Haller (Aus) 72 69 77 73