Jin Jeong defeated Ross Fisher in a play-off to claim victory in the ISPS HANDA Perth International at Lake Karrinyup.
Jeong, 23, prevailed at the first extra hole to claim his first European Tour title after the pair had finished tied on 10 under par after the final round.
The South Korean would not have been expecting to end with the title after a nightmare start to his final round that saw him double-bogey the first.
He recovered with birdies at the fourth and fifth, and as overnight leader Brody Ninyette saw his challenge falter with three bogeys over the final six holes, Jeong hit the front after further gains at the 11th, 12th and 15th.
Fisher hit six birdies against two bogeys on his way to a 68, but after taking Jeong to a play-off the Englishman quickly came unstuck on the return trip down the 18th when his approach shot went through the green, leaving his rival two putts to wrap up his maiden title.
Ninyette's late collapse saw him card a level-par 70 to leave him in a tie for third place alongside fellow Australian Dimitrios Papadatos and England's Danny Willett.
Ireland’s Peter Lawrie and Michael Hoey finished on three under, with compatriot David Higgins on four over.
The result had massive implications for both Lawrie and Higgins.
A 109th place finish in the Race to Dubai saw Lawrie retain his European Tour card for 2014 with the top 110 guaranteed playing rights, but Higgins faces a trip to qualifying school after placing 115th in the rankings.
“I'm just glad it's over to be totally honest with you,” a relieved Lawrie told the official European Tour website.
“I've never felt so much pressure as the last eight weeks - can't sleep, can't eat properly, it’s just horrendous. I wouldn't wish it on my worst enemy.”