Thongchai Jaidee has won the Ballantine's Championship following a play-off after the tournament at Jeju Island's Pinx Golf Club ended in a three-way tie.
The Thai golfer trailed third-round leader Robert-Jan Derksen by four shots coming into the final day.
But as the Dutchman fell away, 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.
That forced an extra hole at the par-five 18th. After both he and Kang placed their third shot close to the pin, the 39-year-old had to wait as Jeju Island native Kang placed his birdie attempt from six feet just wide of the hole.
He then stepped up and 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.
Peter Lawrie was the best of the Irish with a final round 66 moving him to one under par and a top-ten finish.
Gareth Maybin shot a final round 72 to finish on four under, while Paul McGinley will be disappointed with his week's work as a final round 73 had him well down the field on eight over.
