Alfredo Emilio Sepúlveda Sandoval (born 3 August 1993) is a Chilean athlete specialising in the 400 metres hurdles. He won a silver medal at the 2018 South American Games in a new national record of 49.62.

International competitions Representing 2010South American Youth ChampionshipsSantiago, Chile1st400 m hurdles (84 cm)53.62012World Junior ChampionshipsBarcelona, Spain43rd (h)400 m hurdles53.432014South American GamesSantiago, Chile6th400 m hurdles52.684th4 × 400 m relay3:16.98South American U23 ChampionshipsMontevideo, Uruguay3rd400 m hurdles51.562nd4 × 400 m relay3:11.932015Pan American GamesToronto, Canada16th (h)400 m hurdles52.3210th (h)4 × 400 m relay3:09.89UniversiadeGwangju, South Korea14th (sf)400 m hurdles51.322016Ibero-American ChampionshipsRio de Janeiro, Brazil6th400 m hurdles49.864th4 × 400 m relay3:07.562017South American ChampionshipsAsunción, Paraguay3rd400 m hurdles50.374th4 × 400 m relay3:13.64UniversiadeTaipei, Taiwan21st (sf)400 m hurdles52.262018South American GamesCochabamba, Bolivia2nd400 m hurdles49.623rd4 × 400 m relay3:11.58Ibero-American ChampionshipsTrujillo, Peru8th400 m hurdles51.511st4 × 400 m relay3:10.772019South American ChampionshipsLima, Peru2nd400 m hurdles50.033rd4 × 400 m relay3:11.842021South American ChampionshipsGuayaquil, Ecuador4th400 m hurdles51.692022Ibero-American ChampionshipsLa Nucía, Spain4th400 m hurdles50.35Bolivarian GamesValledupar, Colombia2nd400 m hurdles50.255th4 × 400 m relay3:11.92South American GamesAsunción, Paraguay5th400 m hurdles51.694th4 × 400 m relay3:10.002023Pan American GamesSantiago, Chile12th (h)400 m hurdles52.342024Ibero-American ChampionshipsCuiabá, Brazil8th400 m hurdles53.03 –4 × 400 m relayDQ

Personal best Outdoor 200 metres – 21.92 (-1.9 ms/, Cochabamba 2018) 400 metres – 46.44 (São Paulo, 2018) 800 metres – 1:53.53 (Montevideo 2016) 400 metres hurdles – 49.62 (Cochabamba 2018)

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