Simon Khan, ranked 255th in the world, pulled off the second shock victory in seven days after Paul Casey blew a four-shot lead in the Celtic Manor Wales Open.

Inspired by the win of his friend and world number 435 Scott Drummond in the PGA Championship, Khan triumphed on the second extra hole at Wentwood Hills after Casey had bravely birdied the 18th to force a play-off, the duo finishing tied on 21 under par.

After the first play-off hole was halved in scrappy par fives the players returned to the 18th where Casey carved his approach into the crowd and then fluffed his pitch to the green.

Khan, who had missed from six feet on the 72nd hole to claim victory, then two-putted for birdie from the front edge of the green to claim his first tour title and the £250,000 first prize.

The 31-year-old from Essex equalled the tour record with a front nine of 27 in his course record 61 on Friday, when he threatened to shoot the first sub-60 round in Europe.

He had never finished higher than fourth before however and looked destined to miss out on victory when Casey was four clear with seven holes to play.

But the Ryder Cup hopeful, who would have virtually sealed his place in the European side with a victory, ran up a double-bogey six on the 15th while Khan had three birdies in four holes to edge ahead for the first time on the 16th.

Both players then found the same greenside bunker on the 72nd hole but Casey holed from 10ft for birdie and Khan missed from six to take the tournament into extra holes.

"I have heard people say it is a difficult thing to hole a putt to win and I found that out today," said Khan, who jumped to 11th on the Order of Merit.

"That was probably the most nervous I have ever felt on the 72nd hole but anyone can miss a putt, I got over it and I am proud of that.

"I was trying not to think about Scott but a few times he popped into my head. I've known him for years, it was amazing what he did and it was an inspiration."

Khan has made a total of nine visits to the European Tour qualifying school and revealed he had taken a variety of jobs, from taxi driving to roofing and pipe fitting, to fund his golf.

But he revealed it was something his wife Lesley said on Sunday night while they were watching Drummond's victory which made the difference this week.

"Scott's win got me thinking and my wife said 'you used to play to win, even if it was local PGA events or pro-ams'," Khan added.

"You can fall into the trap on tour of trying to have a good finish, a top 10 to secure your card.

"It was almost like somebody turning on the light, it was a different mind-set and I definitely had that this week. Watching Scott win that definitely hit home.

"I still think of those hard times and it makes it all the sweeter. I always believed I would get here although sometimes the evidence does not support that and you are playing MasterCard tour events and staying in not very nice B&B's."

Khan acknowledged the 13th hole was the turning point of the round, where he holed from 25ft to avoid falling four behind again with Casey just two feet away from the hole for his birdie.

"If I missed that he was four ahead again and it was pretty much over," added Khan. "As long as you are within touching distance you never know and things can change on this course."

They duly did with Khan holing from 12ft on the next before Casey's wild drive on the 15th and subsequent three-putt brought the pair on level terms, Khan then hitting a superb pitch to within inches of the hole on the 16th.

Casey, who still moved into sixth on the Ryder Cup standings, said: "This should have been a day when I polished it off, not even a contest, but having said that Simon played a wonderful round of golf and what with the 61 as well, he has played very, very well.

"The bogey on the first got me off on the wrong foot and we felt like we were in between clubs all day. It was one of those rounds which was a grind, and my putting has been bad the last year basically."

Collated final scores (GB & Ire unless stated)

267 Simon Khan 69 61 70 67 (£250,000), Paul Casey 69 63 65 70 (£166,660)

*Khan won at second play-off hole*

271 Jean-Francois Remesy (Fra) 71 69 66 65 (£93,900)

273 Nick O'Hern (Aus) 70 67 68 68 (£75,000)

274 Martin Maritz (Rsa) 69 71 67 67, David Howell 65 74 67 68, Alastair Forsyth 74 66 65 69, John Bickerton 70 71 63 70

276 Stephen Dodd 70 69 67 70, Ian Poulter 71 69 66 70, James Kingston (Rsa) 70 66 66 74

277 Peter O'Malley (Aus) 70 71 68 68, Marten Olander (Swe) 72 66 69 70, Thomas Levet (Fra) 69 71 67 70

278 Santiago Luna (Spa) 70 69 73 66, Mads Vibe-Hastrup (Den) 70 69 72 67, Fredrik Andersson (Swe) 69 71 70 68, Joakim Haeggman (Swe) 73 69 68 68, Robert Karlsson (Swe) 68 72 69 69, Marcus Fraser (Aus) 72 66 70 70, Miguel Angel Martin (Spa) 69 69 70 70, Marcel Siem (Ger) 66 72 70 70, Robert Coles 70 70 68 70, Jarrod Moseley (Aus) 68 72 66 72, Colin Montgomerie 67 68 69 74

279 Terry Price (Aus) 71 69 70 69, Steven O'Hara 67 73 70 69, Damien McGrane 76 67 67 69, Ian Woosnam 71 69 69 70, David Carter 68 79 70 72

280 Stuart Little 68 72 71 69, Martin Erlandsson (Swe) 71 69 68 72, Philip Golding 71 66 67 76

281 Michael Campbell (Nzl) 72 70 71 68, Andrew Coltart 70 72 70 69, Barry Lane 69 74 68 70, Miles Tunnicliff 69 71 69 72, Mark Foster 71 69 68 73, Stephen Gallacher 71 66 70 74, Mikko Ilonen (Fin) 68 70 68 75

282 Jonathan Lomas 70 72 71 69, Stephen Scahill (Nzl) 73 68 71 70, Andrew Marshall 75 68 69 70, Christian Cevaer (Fra) 67 70 74 71, Peter Hanson (Swe) 69 70 72 71, Nicolas Colsaerts (Bel) 73 67 70 72, Paul McGinley 70 71 69 72, Peter Lawrie 71 64 70 77

283 Anthony Wall 72 70 75 66, Christopher Hanell (Swe) 73 69 70 71, Francois Delamontagne (Fra) 72 69 70 72, Phillip Price 72 70 68 73, Robert-Jan Derksen (Ned) 71 71 68 73, Jean-Francois Lucquin (Fra) 73 70 65 75, Steven Jeppesen (Swe) 71 65 70 77

284 Gary Orr 70 70 74 70, Gary Evans 71 69 73 71, Gary Murphy 68 71 73 72, Michael Jonzon (Swe) 71 70 70 73, David Lynn 69 70 71 74

285 Graeme McDowell 73 70 71 71, Simon Wakefield 71 71 70 73, David Dixon 70 70 71 74, Per Nyman (Swe) 70 68 72 75

286 Peter Baker 70 68 80 68, Jarmo Sandelin (Swe) 72 71 74 69

287 Gordon Brand Jnr 73 69 70 75, Barry Austin 71 68 72 76, Patrik Sjoland (Swe) 71 71 69 76

289 Richard Green (Aus) 71 71 75 72, Emanuele Canonica (Ita) 66 75 72 76

290 Soren Kjeldsen (Den) 69 70 73 78

291 Roger Chapman 72 71 70 78

292 Louis Oosthuizen (Rsa) 71 71 78 72, Richard Sterne (Rsa) 71 69 72 80

293 Sven Struver (Ger) 69 74 72 78

297 Warren Bennett 70 73 76 78