Celtic Manor - Thailand's Thongchai Jaidee braved driving rain at Celtic Manor to win the Wales Open by one stroke on Sunday.
Playing in a short-sleeved red shirt despite the cold and damp conditions, Thongchai closed with a one-over par 72 for a six under total with a clutch of players on five under.
England's Ross Fisher, part of the European Ryder Cup team that won an epic battle against the United States on the same course in 2010, ended two strokes back after receiving a one-stroke penalty for slow play.
Thongchai, who had four previous wins on the European Tour, all in Asia, held a one-stroke lead going into the final round but dropped a shot at the fourth and leaked two more with a double bogey seven at the ninth which allowed Dutchman Joost Luiten to grab the lead.
However, three consecutive birdies from the 10th and another at the 15th put the Thai back in the driving seat and he claimed victory despite bogeys at 16 and 18.
"Conditions were quite tough for me," said 42-year-old Thongchai who spent the previous evening at a Thai restaurant in nearby Newport. "I tried to hit everything on the fairway - that's the main thing - then hit the ball on the green. It was very, very tough for me, not like Thailand!"
Dane Thomas Bjorn, Spain's Gonzalo Fernandez-Castano, Luiten and South Africa's Richard Sterne all finished a stroke behind.
Ireland's Paul McGinley blasted up to a share of sixth place with Fisher after a final round of 65.
Fisher was docked a shot after appearing to par the 14th - officials penalising him for slow play after putting the final group of himself, Thongchai and Luiten on the clock.
Collated fourth round scores in the European Tour Wales Open at Celtic Manor on Sunday (GBR and IRL unless stated, par 71):
278 - Thongchai Jaidee (THA) 71-68-67-72
279 - Joost Luiten (NED) 74-69-64-72, Thomas Bjorn (DEN) 71-72-68-68, Gonzalo Fdez-Castano (ESP) 69-74-69-67, Richard Sterne (RSA) 73-69-69-68
280 - Ross Fisher 70-66-71-73, Paul McGinley 72-73-70-65
281 - Joel Sjoholm (SWE) 69-74-70-68, Romain Wattel (FRA) 73-72-68-68, Peter Lawrie 72-73-69-67
283 - Carlos Del Moral (ESP) 75-68-66-74, David Drysdale 72-71-71-69, David Lynn 73-71-67-72
284 - Chris Wood 72-67-74-71, Paul Lawrie 74-69-71-70, Gregory Bourdy (FRA) 74-69-68-73, George Coetzee (RSA) 71-71-68-74
285 - Magnus A Carlsson (SWE) 77-67-70-71, Robert Coles 73-69-72-71, Richard McEvoy 71-70-69-75, Jaco Van Zyl (RSA) 72-69-71-73, Raphael Jacquelin (FRA) 76-65-72-72, Brett Rumford (AUS) 74-70-70-71, Federico Colombo (ITA) 79-68-67-71, Thorbjorn Olesen (DEN) 73-68-71-73, Tim Sluiter (NED) 68-72-68-77, Mark Foster 72-69-69-75
286 - Damien McGrane 71-71-69-75, Matteo Manassero (ITA) 76-68-68-74, Fabrizio Zanotti (PAR) 70-69-75-72, Pablo Larrazabal (ESP) 69-74-71-72, Lee Slattery 67-71-76-72
287 - Jean-Baptiste Gonnet (FRA) 74-69-75-69, Marcel Siem (GER) 68-75-66-78
288 - Emiliano Grillo (ARG) 73-69-71-75, George Murray 75-71-69-73, Tom Lewis 74-71-72-71, Keith Horne (RSA) 79-66-68-75, Matthew Zions (AUS) 76-71-68-73, Joakim Lagergren (SWE) 72-72-74-70, Simon Thornton 69-73-77-69
289 - Stephen Gallacher 77-70-75-67, Knut Borsheim (NOR) 74-71-76-68, Oscar Floren (SWE) 78-69-67-75, Marcus Fraser (AUS) 70-77-71-71
290 - Francesco Molinari (ITA) 74-69-73-74, Oliver Fisher 76-71-73-70
291 - Andrew Johnston 75-72-71-73, David Howell 73-69-75-74, Oliver Wilson 73-73-74-71, David Horsey 71-73-74-73, Maarten Lafeber (NED) 74-72-72-73, Steven O'Hara 70-72-73-76, Simon Khan 75-70-74-72, Rich Beem (USA) 77-68-73-73, Reinier Saxton (NED) 74-71-75-71
292 - Jamie Elson 71-75-73-73, Miguel Angel Jimenez (ESP) 76-71-74-71, Tommy Fleetwood 75-68-78-71, Lorenzo Gagli (ITA) 77-70-66-79, James Morrison 77-70-72-73
293 - Ricardo Gonzalez (ARG) 73-72-76-72, Colin Montgomerie 74-72-72-75, Andrew Marshall 72-74-75-72
294 - Gregory Havret (FRA) 75-72-71-76
295 - Benjamin Hebert (FRA) 73-72-75-75
296 - Daniel Denison 78-67-75-76, Steen Tinning (DEN) 73-73-73-77
297 - Graeme Storm 80-67-80-70
298 - Niclas Fasth (SWE) 74-73-70-81, Fredrik Andersson Hed (SWE) 71-75-79-73
299 - Andrea Pavan (ITA) 76-71-74-78
302 - Jamie Moul 78-67-77-80
303 - Scott Hend (AUS) 80-66-70-87