Prom Meesawat's final-round 67 earned him a bye into the last 16 of the World Super 6 in Perth on Saturday.
The Thai finished two shots clear of the chasing pack on 12 under following the third and final round of stroke play, handing him an advantage in the match play that follows on Sunday.
Thorbjorn Olesen, Sean Crocker and Lucas Herbert closed on 10 under, while Dimitrios Papadatos, Brad Kennedy, Sam Horsfield and Yusaku Miyazato also secured top-eight spots, guaranteeing a seeded berth in the second round of match play.
Overnight leaders Brett Rumford, the defending champion, and Lee Westwood endured miserable days at Lake Karrinyup Country Club, with each carding a six-over-par 78 to miss out on the final day's play.
Top eight seeds confirmed.— The European Tour (@EuropeanTour) February 10, 2018
"I did well for the last two days, I only missed a couple of shots to put myself in the top position," said Meesawat.
"Very happy to finish first but still a lot of golf for and I think it's going to be good fun.
"It [a win] means a lot. I'm going to earn my European Tour card and it's going to be the first win for me on the European Tour.
"I'm just going to go out and have fun, concentrate with my game."
A play-off was needed to reduce a field of nine tied players down to eight, leaving 24 in total for the match-play phase.
Anthony Quayle was the man to miss out, as Meesawat's compatriot Kiradech Aphibarnrat held his nerve to edge through.
|Bayern Munich boss Kovac planning for Boateng stay|
|Championship Review: West Brom crush QPR as Leeds stay perfect|
|Allegri pleased with Ronaldo despite goalless Juventus debut|
|Chelsea can produce magic with Sarri in charge - Hazard|
|Emery ´happy without the result´ as Arsenal comeback falls short|
|Gordon confirms Cleveland Browns return|
|Eight shots and only 30 passes - Ronaldo´s Juventus debut in Opta numbers|
|Cristiano Ronaldo´s debuts: Best impressed, scoring a penalty & a blank for Juventus|
|Old boy Escare haunts Catalans in big Wigan win|
|Preston North End 2 Stoke City 2: Super sub Crouch salvages a point|
|Pochettino vows not to discuss Alderweireld future before five-minute answer|
|Waring, Aiken lead the way as Olesen stays in the hunt|
|Linking play, forcing saves and clashing with goalkeeper - Cristiano Ronaldo´s Juventus debut|
|Chelsea 3 Arsenal 2: Alonso snatches win after Gunners comeback|
|West Ham still haunted by last season - Pellegrini|
|Puel defends Vardy after Wolves red card|
|Chievo 2 Juventus 3: Ronaldo´s debut ends in dramatic win|
|Mbappe: Neymar is Paris Saint-Germain´s superstar|
|Pickford should have seen red - Hughes fumes over challenge on Ings|
|Kohli and Rahane star as India edge day one|
|AC Milan´s Strinic sidelined by heart problem|
|Kane happy to banish August goal hoodoo|
|Guingamp 1 Paris Saint-Germain 3: Mbappe returns to inspire comeback|
|Springboks´ second-half revival punishes Pumas|
|Finally! Kane scores a Premier League goal in August|
|Warnock enjoyed ´poetic justice´ of Kenedy´s penalty woe|
|Holders Eintracht Frankfurt stunned by Ulm in DFB-Pokal|
|West Ham 1 Bournemouth 2: Wilson, Cook condemn Hammers to successive losses|
|Tottenham 3 Fulham 1: Trippier and Kane help Spurs avoid Wembley wobble|
|Leicester City 2 Wolves 0: Lucky Foxes win despite Vardy red card|
|Everton 2 Southampton 1: Richarlison continues fine start|
|Drochtersen/Assel 0 Bayern Munich 1: Lewandowski spares Bayern´s blushes|
|Violent hack, no passes, missed penalty - Kenedy´s Cardiff nightmare|
|Ronaldo handed Juventus debut against Chievo|
|Cheika and Hooper frustrated by second-half slump|
|Hansen issues warning after All Blacks win Wallabies ´prizefight´|
|Stuttgart stay good for Pavard, says Reschke|
|You can´t buy class - United boss Mourinho blasts City documentary|
|Cardiff City 0 Newcastle United 0: Penalty miss rounds off abject day for Kenedy|
|Lopetegui open to rotating Real Madrid goalkeepers|
|´World´s best´ Alisson will be difficult to replace, says Roma boss Di Francesco|
|Dragons and Sharks pounce on Panthers after four get sin-binned|
|AC Milan situation has proved FFP works - UEFA president Ceferin|
|Marseille´s Garcia uninterested in striker despite Balotelli link|
|Goodhue sparkles on debut as All Blacks thump Wallabies|
|I feel like chicken tonight - Saunders game for a laugh after Wilder fowl play|
|Aubameyang-Lacazette partnership possible for Arsenal|
|Pant handed debut as India ring changes at Trent Bridge|
|Pochettino pledges to protect Kane|
|Federer relieved to ´hang tough´ in Cincinnati|
|De Bruyne injury: Can Foden or Diaz replace Man City playmaker?|
|Furyk confident as Team USA takes shape|
|Neymar´s behaviour deserves praise, Tite claims|
|Scherzer, Harper lead Nationals past Marlins|
|Djokovic and Federer join Cilic, Goffin in Cincinnati semis|
|Federer outlasts recovering Wawrinka|
|WATCH: Djokovic wins match, loses car|
|Bolt arrives in Sydney for A-League trial|
|Red-hot Bertens beats Svitolina, Halep marches on|
|Snedeker preserves Wyndham lead|
|Halep hits back to torment Tsurenko|
|Raonic fails to break Djokovic stranglehold|
|Emery seeks more ´demanding´ Ozil|
|CAF Champions League Review: Wydad, Al Ahly & TP Mazembe qualify|
|Stephen Curry wants to finish his career with Warriors|
|Hazard among Europe´s best but can improve, says Sarri|
|Tigers boost top-two hopes, Giants close in on fourth|
|Birmingham City 0 Swansea City 0: Monk´s men held despite dominance|
|Inter taking legal action against Tebas over Modric transfer comments|
|Serie A transfer round-up: Zaza joins Torino, Parma sign Gervinho|