Seo at 2018 Indonesia Masters
|Born||4 September 1997|
Jeonju, Jeollabuk-do, South Korea
|Residence||Buan, Jeollabuk-do, South Korea|
|Height||1.82 m (6 ft 0 in)|
|Men's & mixed doubles|
|Highest ranking||14 (MD 17 September 2019)|
5 (XD 17 May 2018)
|Current ranking||14 (MD), 5 (XD) (24 September 2019)|
Seo Seung-jae (Hangul: 서승재; born 4 September 1997) is a South Korean badminton player. In 2014, he competed at the Summer Youth Olympics in Nanjing, China. In 2017, he helped the Korean national team compete at the 2017 Sudirman Cup and won the trophy and the gold medal at that tournament.
|Kim Jae-hwan|| Katsuki Tamate
BWF World Junior Championships
|2013||Hua Mark Indoor Stadium,
|Choi Jong-woo|| Huang Kaixiang
Asian Junior Championships
|2015||CPB Badminton Training Center, Bangkok, Thailand||Lin Guipu||16–21, 11–21||Silver|
BWF World Tour
The BWF World Tour, announced on 19 March 2017 and implemented in 2018, is a series of elite badminton tournaments, sanctioned by Badminton World Federation (BWF). The BWF World Tour are divided into six levels, namely World Tour Finals, Super 1000, Super 750, Super 500, Super 300 (part of the HSBC World Tour), and the BWF Tour Super 100.
|2019||Vietnam Open||Super 100||Choi Sol-gyu|| Na Sung-seung
|18–21, 21–16, 21–14||Winner|
|2019||Chinese Taipei Open||Super 300||Choi Sol-gyu|| Goh V Shem
Tan Wee Kiong
|19–21, 21–15, 21–23||Runner-up|
|2019||Spain Masters||Super 300||Kim Won-ho|| Lee Yang
|2018||Korea Masters||Super 300||Choi Sol-gyu|| Po Li-wei
|21–12, 17–21, 21–18||Winner|
|2019||Chinese Taipei Open||Super 300||Chae Yoo-jung|| Tang Chun Man
Tse Ying Suet
|2019||German Open||Super 300||Chae Yoo-jung|| Hafiz Faisal
Gloria Emanuelle Widjaja
|2019||Spain Masters||Super 300||Chae Yoo-jung|| Wang Chi-lin
|2018||French Open||Super 750||Chae Yoo-jung|| Zheng Siwei
|2018||Australian Open||Super 300||Chae Yoo-jung|| Chan Peng Soon
Goh Liu Ying
|2018||New Zealand Open||Super 300||Chae Yoo-jung|| Wang Chi-lin
|19–21, 21–14, 19–21||Runner-up|
BWF Grand Prix
|2017||Korea Masters||Kim Won-ho|| Jung Jae-wook
|2017||Macau Open||Kim Won-ho|| Wahyu Nayaka
|2017||Canada Open||Kim Won-ho|| Peter Briggs
|20–22, 21–16, 19–21||Runner-up|
|2017||Korea Masters||Kim Ha-na|| Choi Sol-gyu
|17–21, 21–13, 21–18||Winner|
|2017||Macau Open||Kim Ha-na|| Zheng Siwei
|2017||U.S. Open||Kim Ha-na|| Kim Won-ho
|16–21, 21–14, 21–11||Winner|
|2017||Chinese Taipei Open||Kim Ha-na|| Wang Chi-lin
BWF International Challenge/Series
|2018||Irish Open||Choi Sol-gyu|| Jack MacGregor
|2018||Norwegian International||Choi Sol-gyu|| Mads Emil Christensen
- Lee, Seo-no (20 January 2015). "부안출신 서승재 태국주니어오픈 배드민턴선수권대회서 2관왕" (in Korean). Buan News. Retrieved 18 July 2017.
- "Players: Seo Seung Jae". Badminton World Federation. Retrieved 30 May 2017.
- "'라이벌' 서승재·이준수 "올림픽 메달은 내가 딴다"" (in Korean). The Dong-a Ilbo. Retrieved 30 May 2017.
- "[난징청소년올림픽] 펜싱-사격에서 은1, 동1개" (in Korean). No Cut News. Retrieved 30 May 2017.
- "Korea wins Sudirman Cup badminton final on Gold Coast". Gold Coast Bulletin. Retrieved 30 May 2017.
- "BWF Launches New Events Structure". Badminton World Federation. 29 November 2017.
- "Action-Packed Season Ahead!". Badminton World Federation. 15 January 2018.
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