Yoon Ji-su (; or ; born 24 January 1993) is a South Korean right-handed sabre fencer.

Yoon is a four-time team Asian champion and a two-time individual Asian champion.

A two-time Olympian, Yoon is a 2021 team Olympic bronze medalist.

Early life Yoon is the youngest of two children and only daughter of retired baseball player and coach . She was born and raised in Busan as her father was a "one-team man" who spent his entire playing career and part of his coaching career with Lotte Giants. Her father had been initially opposed to her becoming a professional athlete but relented after much persuasion.

Yoon was initially a taekwondo athlete in elementary school before switching to fencing in middle school. As a high school student, she participated in the 2010 Junior World Fencing Championships.

Career Yoon was first selected for the senior national team in 2011 and won individual gold at the 2012 Asian Championships. She did not participate in the 2012 Summer Olympics as the women's team sabre was not in rotation and she was not ranked high enough to be selected for the individual event. In 2014, she was part of the team along with Kim Ji-yeon, Hwang Seon-a and Lee Ra-jin and they won silver at the Asian Championships and gold at the Asian Games.

Yoon won her first ever Fencing World Cup medal in October 2015, at the Orléans competition. She was joint bronze medalist with Ibtihaj Muhammad. At the 2016 Summer Olympics, she only participated in the team event but they failed to win a medal after losing to Ukraine at the first stage. She won her first World Championships medal when they won silver in the team event at the 2017 World Championships.

Medal record Olympic Games YearLocationEventPosition2021 Tokyo, JapanTeam Women's Sabre3rd

World Championship YearLocationEventPosition2017 Leipzig, GermanyTeam Women's Sabre2nd2018 Wuxi, ChinaTeam Women's Sabre3rd2019 Budapest, HungaryTeam Women's Sabre3rd

Asian Championship YearLocationEventPosition2012 Wakayama, JapanIndividual Women's Sabre1st2012 Wakayama, JapanTeam Women's Sabre1st2013 Shanghai, ChinaTeam Women's Sabre1st2014 Suwon, South KoreaTeam Women's Sabre2nd2015 SingaporeTeam Women's Sabre1st2016 Wuxi, ChinaIndividual Women's Sabre3rd2016 Wuxi, ChinaTeam Women's Sabre2nd2017 Hong Kong, ChinaTeam Women's Sabre2nd2018 Bangkok, ThailandTeam Women's Sabre2nd2019 Tokyo, JapanIndividual Women's Sabre1st2019 Tokyo, JapanTeam Women's Sabre2nd2022 Seoul, South KoreaTeam Women's Sabre1st

Grand Prix DateLocationEventPosition2021-11-12 Orléans, FranceIndividual Women's Sabre3rd

World Cup DateLocationEventPosition2015-10-30 Orléans, FranceIndividual Women's Sabre3rd2021-03-12 Budapest, HungaryIndividual Women's Sabre3rd

Personal life Yoon attended Dong-Eui University, one of the few universities with a fencing team, and was contemporaries with fellow sabre fencer Kim Jun-ho. She is enrolled as a graduate student at Kookmin University, studying sports psychology."목표를 향한 도전이 가장 아름답습니다 2018 자카르타-팔렘방 아시안 게임 펜싱 금메달리스트 구본길, 황선아, 윤지수 선수 (국민대학교 스포츠산업대학원)" (in Korean). UNIK webzine (Vol. 56). Kookmin University. April 2018.

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