Justin Thomas added another title to his collection after overcoming Marc Leishman following a second play-off hole inaugural The CJ Cup at Nine Bridges on Sunday.
Thomas has enjoyed a breakout year, winning the FedEx Cup and his maiden major at the U.S. Open as he earned PGA Tour Player of the Year honours.
And the red-hot 24-year-old continued his fine form in Jeju after getting the better of Australia's Leishman in a tense climax.
Thomas – who shared the overnight lead with Scott Brown – finished nine under through 72 holes following an even-par 72 in South Korea.
The American star moved clear of Brown but he had company atop the leaderboard in the form of BMW Championship winner Leishman, who like Thomas birdied his final hole at the 18th to force a play-off.
Leishman ran into some early trouble on the first play-off hole but he recovered to almost secure victory, though both players posted pars as the shoot-out continued.
Another recovery was not forthcoming from Leishman, who found the water on the second extra hole and finished with a bogey, paving the way for Thomas to clinch a seventh PGA Tour title courtesy of a birdie.
Leishman's compatriot Cameron Smith ended the tournament one stroke off the pace after shooting a two-under-par 70.
Kim Whee (72) was two shots further back at six under, one ahead of Pat Perez (68), Jamie Lovemark (71), Brian Harman (71), Luke List (72), Brown (76) and Anirban Lahiri (74).
Former world number one Jason Day finished four under following his final-round 71, while Rookie of the Year Xander Schauffele (76) struggled to 17 over the card.
|Samuel open to Higuain-Icardi swap deal|
|It´s just a game - Milligan disappointed by Kruse criticism|
|From drug-testing lab to gastro pub: Sochi happy not to forget dark past|
|Ronaldo will do what is best for him, says Carvajal|
|Kohli: India will feel at home in England|
|Barca target Lenglet yet to decide future|
|Germany perform best under pressure, Klose claims|
|Juanfran signs one-year Atletico Madrid extension|
|Julian Nagelsmann: The remarkable rise of RB Leipzig|
|Sterling: my daughter is Liverpool through and through!|
|Van Bommel to take charge of PSV|
|Hansen urges France not to ´squeal´ over decisions|
|Intelligent Jones will turn England´s fortunes around - Moody|
|Nainggolan confirms imminent Inter transfer|
|U.S. Open missed cut may be blessing in disguise - McIlroy|
|Schmidt in no rush to decide on his future|
|Wallabies treating decider as grand final - Hooper|
|Salah won´t leave World Cup, Egypt FA boss claims|
|Chandimal, Hathurusinghe and Gurusinha admit ´serious´ conduct breach|
|Mikal Bridges´ 76ers dreams dashed in dramatic draft twist|
|They want to pull you down - Sterling hits out at tabloid press|
|Lazaridis wants West Ham to stick with Mexico star Hernandez|
|Get behind Sterling, urges Henderson|
|Sampaoli begs for Argentina´s forgiveness|
|The 2018 NBA Draft first round in full|
|Everything still to play for against ´very strong´ France, says Eriksen|
|Cubs bested by Harvey, Yankees sweep Mariners|
|Spurs GM: We´ll do what we can to keep Leonard|
|Lovren: This Croatia team are better than 1998 heroes|
|Internationals Musa, Okobo selected in NBA Draft|
|Modric is the world´s best number 10 – Arbeloa|
|Kurz stay crucial to Jakobsen´s Adelaide move|
|Nuggets end Porter´s slide at number 14|
|Argentina were crying like girls – Vrsaljko|
|Cavaliers select Sexton with number eight overall pick|
|Argentina must ´pray´ results go their way, says Mascherano|
|Grizzlies select Jackson with number four pick|
|Hawks select Doncic with third pick, trade him to Mavericks|
|Kings take Bagley with number two pick|
|Suns select Ayton number one overall in NBA Draft|
|Argentina concerns grow as Dalic vows to rest players against Iceland|
|Messi could retire after World Cup, says Zabaleta|
|Spieth, McIlroy off to hot starts at Travelers Championship|
|Let Sampaoli say what he wants - Aguero angry at Argentina loss|
|Perisic: Messi is the best, but Argentina do not play as a team|
|Dominant England are ´spoiled´ by options, says Morgan|
|Argentina squad ´clouds´ Messi´s brilliance, claims Sampaoli|
|Fagner to start for Brazil due to Danilo injury|
|Arzani lauds leader Jedinak and remains confident on last-16 chances|
|Croatia cut Messi off in Argentina thrashing - Modric|
|Pogba: Kante, Matuidi have 15 lungs|
|Julian Nagelsmann: the Bundesliga prodigy swapping Hoffenheim for RB Leipzig|
|England dominate in Durham to close in on series whitewash|
|´Fortunate´ Federer closes in on Halle title|
|Calamity Caballero and Sampaoli tinkerings leave Argentina a broken mess|
|Wimbledon champion Muguruza confident despite Birmingham defeat|
|Argentina 0 Croatia 3: Caballero drops clanger as Messi´s men are stunned|
|Funes Mori departs Everton to join Villarreal|
|Djokovic beats Dimitrov as Kyrgios lays down a marker|
|Relegated Verona appoint World Cup winner Grosso|
|Trotz named Islanders´ new coach|
|Matic and Serbia ready for ´hellish´ Switzerland clash|
|Fleetwood flounders as Gros takes Pulheim lead|
|No attacks on Neymar, pledges Costa Rica boss Ramirez|
|Giroud return brings structure to France, but again they disappoint|
|Brighton sign Sunderland goalkeeper Steele|
|Schmeichel and Eriksen blast ´exceptionally harsh´ VAR penalty|
|Nigeria´s young World Cup squad learning on the job - Rohr|
|Moody: England players need protection|
|France 1 Peru 0: Mbappe books last-16 spot with record goal|