Thailand's Thongchai Jaidee kept his nerve to win the second edition of the Ballantine's Championship after a play-off at a windswept Pinx Golf Club on Jeju Island.
Thongchai shot a round of two-under 70 to move into joint first alongside Spain's Gonzalo Fernandez-Castano and local player Kang Sung-hoon on four-under overall and force an extra hole at the par-four 18th.
After both he and Kang placed their second shot close to the pin, the 39-year-old had to wait as Jeju Island-born Kang sent his birdie attempt from six feet just wide of the hole.
But Thongchai holed his own putt from five foot to win his second co-sanctioned European and Asian Tour event of the year following his success at the Enjoy Jakarta Indonesia Open in March.
It was a win which had seemed unlikely last night, as strong winds affected scores right across the board and left Thongchai trailing overnight leader Robert-Jan Derksen by four shots.
The Thai golfer was one of the most affected by the adverse weather conditions, as his ball was moved by the wind as he shaped to putt at the seventh green yesterday, causing a lengthy delay as officials looked at television footage before eventually handing Thongchai a one-shot penalty.
But the now four-time winner on the European Tour insisted he had not been unnerved, and instead today focused solely on his target of breaking into the world top 50.
"The tournament is never finished and you never know who is going to win," he said.
"That's my thing. I know we get angry when we have trouble. I had a one-shot penalty on seven (yesterday) when the ball moved, when I set up to putt. But I just think tomorrow, I can mark it and we do again.
"I try, and I think my heart is calm even when everyone else is angry. Sometimes you can have trouble if you are thinking badly. I think, 'It's going to be one more day, one more hole."'
Thongchai had trailed Fernandez-Castano then Kang by one shot for most of the fourth round, but when the leading duo dropped shots at 17 and 18 respectively Thongchai held par throughout his final eight holes after earlier carding three birdies and a bogey to force the extra round.
Before then he had had to watch nervously, however, as both of his opponents had chances to pull further ahead after reaching the 18th green in two shots during their regular round.
Fernandez-Castano, who dropped off the pace with rounds of 74 and 76 over the next two rounds as wind and rain affected the 2.1million euro event, trailed Derksen by five shots at the start of play this morning.
But a round of three-under 69 including four birdies and an eagle at the fourth, pushed the runner-up from last week's Volvo Open in Beijing back up to the top of the leaderboard.
Kang meanwhile moved up on the early leaders with two birdies and a 10th-hole eagle before taking a one-shot lead into his final hole thanks to another eagle at the 16th.
There he had the chance for a birdie to move further into the lead and all but cement his first tournament win, but he three-putted his attempt to drop back to four-under 68.
"Coming into the tournament my goal was to be in the top 10, which I achieved so I'm happy," said the 21-year-old.
"The only thing I wish was different was that 18th hole. I three-putted which is why I was in the playoff. If I could do anything differently it would be that."
Fernandez-Castano was next up at the final hole. His long-putt attempt at a birdie stopped just short but he still made par to leave the two tied in first place with Thonchai who still had two holes to play.
Ernie Els joined Derksen at two-under after shooting a one-under 71. The pair were joined by England's Seve Benson, who carded a three-under 69 today while briefly flirting with the lead before holing a double bogey at 17, and Spain's Rafael Cabrera-Bello (70).
Open de Espana winner Peter Lawrie warmed up for the defence of his title next week with the day's best round of six-under 66 to move up to one-under overall, where he was joined by Mardan Marmat and Danny Willett.
Collated final-round scores (Gbr & Irl unless stated, par 72):
284 Thongchai Jaidee (Tha) 66 71 77 70 (Thongchai Jaidee won the three way play off with a birdie 3 at the first extra hole), Sung-hoon Kang (Kor) 69 71 76 68, Gonzalo Fdez-Castano (Spa) 65 74 76 69
286 Robert Jan Derksen (Ned) 66 69 75 76, Ernie Els (Rsa) 68 74 73 71, Rafael Cabrera Bello (Spa) 68 72 76 70, Seve Benson 69 70 78 69
287 Danny Willett 69 76 73 69, Peter Lawrie 70 75 76 66, Mardan Mamat (Sin) 69 70 77 71
288 Ho-sung Choi (Kor) 69 72 76 71, Pablo Martin (Spa) 69 69 74 76, Terry Pilkadaris (Aus) 75 68 74 71, Jason Knutzon (USA) 67 74 75 72
289 Brett Rumford (Aus) 68 73 76 72, Scott Barr (Aus) 68 72 76 73, Wook-Soon Kang (Kor) 68 69 77 75, Kyung-nam Kang (Kor) 66 73 75 75
290 Richard Bland 73 72 78 67, Mikko Ilonen (Fin) 68 73 74 75, Gwang-Soo Choi (Kor) 71 70 74 75, Mark Brown (Nzl) 65 73 78 74, Graeme Storm 72 68 78 72
291 Wei Chih Lu (Tha) 70 75 77 69, Francois Delamontagne (Fra) 72 72 71 76, Rick Kulacz (Aus) 71 71 77 72
292 Zane Scotland 70 73 76 73, Gareth Maybin 70 72 78 72, Hyung-tae Kim (Jpn) 68 72 82 70, Andrew Dodt (Aus) 72 68 76 76
293 Felipe Aguilar (Chi) 69 72 78 74, A-Shun Wu (Chn) 69 75 80 69, Nick Dougherty 71 72 77 73
294 Jose-Filipe Lima (Por) 72 72 76 74, Alessandro Tadini (Ita) 67 71 84 72, Iain Steel (Mal) 70 73 80 71, Markus Brier (Aut) 71 72 81 70, Klas Eriksson (Swe) 71 74 76 73, Lee Westwood 71 73 76 74, Marcus Fraser (Aus) 70 75 75 74
295 Chris Wood 75 70 76 74, Soon-sang Hong (Kor) 68 74 78 75, Andrew Tschudin (Aus) 70 75 75 75, Simon Dyson 69 75 78 73, Barry Lane 71 74 78 72
296 Seung-yul Noh (Kor) 71 69 80 76, Robert Dinwiddie 67 73 82 74, Oskar Henningsson (Swe) 73 72 77 74, Chawalit Plaphol (Tha) 68 74 82 72, Paul McGinley 73 72 78 73
297 Branden Grace (Rsa) 69 70 81 77
298 Prom Meesawat (Tha) 71 73 81 73, Chih-bing Lam (Sin) 68 72 80 78, Fred Couples (USA) 69 76 81 72, Henrik Stenson (Swe) 68 74 81 75
299 Joong Kyung Mo (Kor) 70 73 77 79
300 Wil Besseling (Ned) 71 74 80 75, Wen-Tang Lin (Tai) 73 71 81 75, Hyung-sung Kim (Kor) 69 76 78 77
301 Inder Van Weerelt (Ned) 70 74 83 74, Scott Drummond 70 75 81 75, Wen-hong Lin (Chn) 69 70 84 78, Pablo Larrazabal (Spa) 72 72 79 78
302 Myung-ho Kwon (Kor) 72 72 82 76
303 Jeppe Huldahl (Den) 71 74 86 72, Rhys Davies 70 73 82 78, Ted Oh (Kor) 70 75 80 78
304 Gaurav Ghei (Ind) 69 74 84 77, Fabrizio Zanotti (Par) 71 74 83 76, Thaworn Wiratchant (Tha) 71 74 81 78
305 Digvijay Singh (Ind) 73 71 82 79
306 Eirik Tage Johansen (Nor) 73 72 84 77
308 Peter Hedblom (Swe) 72 72 87 77
321 Somkiat Sri-sanga (Tha) 73 72 89 87