South Korea's Byeong-Hun An leads the leaderboard of the Genesis Scottish Open after the first day. It was a very close competition in which more than half of the field played for par or better.An scored an excellent 9-under 61 to tie the record of The Renaissance Golf Club course and lead the second-place finisher by two strokes. He was especially impressive on the front nine, where he finished with a 5-under 30, with four birdies in a row.PGA TOUR@PGATOURFlawless round from @ByeongHunAn He leads by three after matching the course record at The Renaissance Club @ScottishOpen.38621Flawless round from @ByeongHunAn 👏He leads by three after matching the course record at The Renaissance Club @ScottishOpen. https://t.co/ILlFapJHeWOverall, it was a bogey-free round for the South Korean at the Genesis Scottish Open's first round. His back nine was also a great round, scoring a 4-under 31.Finishing in second place at the Genesis Scottish Open was American Davis Riley, who also had a spectacular front nine. Riley saved the first nine holes alone with 29 strokes (-6), with five birdies in a row. He closed the back nine with a birdie, no bogeys and -7 overall.One of the pre-tournament favorites, Rory McIlroy, finished T3 in the Genesis Scottish Open's first round, tied with Thomas Detry. McIlroy was solid, with seven birdies and an eagle against only one bogey.Detry, meanwhile, did not lose pace with the Northern Irishman and made one more bogey but with eight birdies. Both finished with -6.Defending champion of the Genesis Scottish Open Xander Schauffele finished T74, while the favorite according to the specialized forecasting sites, Scottie Scheffler, was T26 with -2.Genesis Scottish Open leaderboard after Day 1Here is the leaderboard of the Genesis Scottish Open after the first round:1 Byeong-Hun An2 Davis RileyT3 Thomas DetryT3 Rory McIlroyT5 K.H. LeeT5 Yannik PaulT7 Will GordonT7 Ewen FergusonT7 Oliver BekkerT7 David LingmerthT7 Julien BrunT7 Max HomaT7 Ross FisherT7 Tom KimT15 Garrick HiggoT15 Robert MacIntyreT15 Sam BurnsT15 Thorbjørn OlesenT15 Thriston LawrenceT15 Brian HarmanT15 Eric ColeT15 Padraig HarringtonT15 Rickie FowlerT15 Sami ValimakiT15 Sebastian SoderbergT26 Zander LombardT26 Matt FitzpatrickT26 Justin ThomasT26 Min Woo LeeT26 Nick TaylorT26 Marcel SiemT26 Dylan WuT26 Shubhankar SharmaT26 Tapio PulkkanenT26 Charley HoffmanT26 Daniel HillierT26 Keith MitchellT26 Lee HodgesT26 Jordan SmithT26 Antoine RoznerT26 Scottie SchefflerT26 Wyndham ClarkT26 Connor SymeT26 Guido MigliozziT26 Ashun WuT46 Joakim LagergrenT46 Matthew JordanT46 J.T. PostonT46 Dale WhitnellT46 Oliver WilsonT46 Rafa Cabrera BelloT46 Simon ForsströmT46 Ockie StrydomT46 Daniel GavinsT46 Sean CrockerT46 Marcel SchneiderT46 Gavin Kyle GreenT46 Luke ListT46 Adri ArnausT46 Tyrrell HattonT46 Billy HorschelT46 Victor PerezT46 Alex NorenT46 Grant ForrestT46 Richard MansellT46 Dan BradburyT46 Tom HogeT46 Ryan FoxT46 Mackenzie HughesT46 Christiaan BezuidenhoutT46 Ben GriffinT46 S.H. KimT46 Maximilian KiefferT74 David LawT74 Andrew PutnamT74 Jorge CampilloT74 Luke DonaldT74 Kalle SamoojaT74 Xander SchauffeleT74 Tommy FleetwoodT74 Edoardo MolinariT74 Pablo LarrazabalT74 Sungjae ImT74 Joost LuitenT74 Taylor MontgomeryT74 Ben MartinT74 Bio KimT74 Ben TaylorT74 Tom McKibbinT74 Romain LangasqueT74 Calum HillT74 Justin RoseT74 Scott StallingsT74 Patrick RodgersT74 Gary WoodlandT74 Nicolai HojgaardT74 Sam RyderT74 Fabrizio ZanottiT99 Matthew BaldwinT99 Ludvig AbergT99 Lucas HerbertT99 Richie RamsayT99 Francesco MolinariT99 Aaron RaiT99 Adrian MeronkT99 Cam DavisT99 Adrian OtaeguiT99 Scott JamiesonT99 Sahith TheegalaT99 Paul WaringT99 Alex SmalleyT99 Nicolai Von DellingshausenT99 Harry HallT99 Shane LowryT99 Austin EckroatT99 Jamie DonaldsonT99 Alexander BjörkT99 Kurt KitayamaT99 Troy MerritT99 Joseph BramlettT99 Matthew SouthgateT99 Zac BlairT123 Aaron BaddeleyT123 Harrison EndycottT123 Patrick CantlayT123 Kevin YuT123 Jordan SpiethT123 Michael KimT123 Matthieu PavonT123 Adam ScottT123 Erik van RooyenT123 Jimmy WalkerT123 Corey ConnersT123 Justin WaltersT123 Matt WallaceT123 Doug GhimT137 Nicolas ColsaertsT137 Callum ShinkwinT137 C.T. PanT137 Wil BesselingT137 Nick BachemT137 Robby SheltonT137 Callum TarrenT137 Rasmus HojgaardT137 Viktor HovlandT137 Eddie PepperellT137 Chase HannaT148 Hurly LongT148 Danny WillettT148 Marcus ArmitageT151 Brandon WuT151 Haotong LiT151 Yeongsu Kim154 Yoseop Seo155 Dylan FritteliWD Seamus Power