Seong Yu-hyeon () is a South Korean taekwondo practitioner. He won a silver medal at the 2025 World Taekwondo Championships.
Career Seong was named to the South Korean national team for the first time in 2025. He made his World Taekwondo Championships debut at the 2025 World Taekwondo Championships and won a silver medal in the 68 kg category, losing to Banlung Tubtimdang in the finals.
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