Seo Seung-jae
Seo Seung-jae 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.
against Malaysian pair in the final of 2019 Chinese Taipei Open
Achievements
Summer Universiade
Men's doubles| Year | Venue | Partner | Opponent | Score | Result |
| 2017 | Taipei Gymnasium, Taipei, Taiwan |  Kim Jae-hwan |  Katsuki Tamate Kenya Mitsuhashi | 21–12, 21–19 | Gold |
BWF World Junior Championships
Boys' doubles| Year | Venue | Partner | Opponent | Score | Result |
| 2013 | Hua Mark Indoor Stadium, Bangkok, Thailand | Choi Jong-woo |  Huang Kaixiang Zheng Siwei | 11–21, 13–21 | Bronze |
Asian Junior Championships
Boys' singles| Year | Venue | Opponent | Score | Result |
| 2015 | CPB Badminton Training Center, Bangkok, Thailand | Lin Guipu | 16–21, 11–21 | Silver |
BWF World Tour (6 titles, 6 runners-up)
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. The BWF World Tour are divided into six levels, namely World Tour Finals, Super 1000, Super 750, Super 500, Super 300, and the BWF Tour Super 100.Men's doubles
| Year | Tournament | Level | Partner | Opponent | Score | Result |
| 2019 | Syed Modi International | Super 300 | Choi Sol-gyu | He Jiting Tan Qiang | 18–21, 19–21 | Runner-up |
| 2019 | Hong Kong Open | Super 500 | Choi Sol-gyu |  Mohammad Ahsan Hendra Setiawan | 13–21, 21–12, 21–13 | Winner |
| 2019 | Vietnam Open | Super 100 | Choi Sol-gyu | Na Sung-seung Wang Chan | 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 Wang Chi-lin | 8–21, 21–23 | Runner-up |
| 2018 | Korea Masters | Super 300 | Choi Sol-gyu | Po Li-wei Wang Chi-lin | 21–12, 17–21, 21–18 | Winner |
Mixed doubles
| Year | Tournament | Level | Partner | Opponent | Score | Result |
| 2019 | Chinese Taipei Open | Super 300 | Chae Yoo-jung |  Tang Chun Man Tse Ying Suet | 18–21, 10–21 | Runner-up |
| 2019 | German Open | Super 300 | Chae Yoo-jung | Hafiz Faizal Gloria Emanuelle Widjaja | 21–17, 21–11 | Winner |
| 2019 | Spain Masters | Super 300 | Chae Yoo-jung | Wang Chi-lin Cheng Chi-ya | 21–18, 21–15 | Winner |
| 2018 | French Open | Super 750 | Chae Yoo-jung | Zheng Siwei Huang Yaqiong | 19–21, 14–21 | Runner-up |
| 2018 | Australian Open | Super 300 | Chae Yoo-jung | Chan Peng Soon Goh Liu Ying | 21–12, 23–21 | Winner |
| 2018 | New Zealand Open | Super 300 | Chae Yoo-jung | Wang Chi-lin Lee Chia-hsin | 19–21, 21–14, 19–21 | Runner-up |
BWF Grand Prix (4 titles, 3 runners-up)
The BWF Grand Prix has two levels, the BWF Grand Prix and Grand Prix Gold. It is a series of badminton tournaments sanctioned by the Badminton World Federation since 2007.Men's doubles
| Year | Tournament | Partner | Opponent | Score | Result |
| 2017 | Korea Masters | Kim Won-ho | Jung Jae-wook Kim Gi-jung | 21–15, 21–16 | Winner |
| 2017 | Macau Open | Kim Won-ho | Wahyu Nayaka Ade Yusuf | 13–21, 14–21 | Runner-up |
| 2017 | Canada Open | Kim Won-ho |  Peter Briggs Tom Wolfenden | 20–22, 21–16, 19–21 | Runner-up |
Mixed doubles
| Year | Tournament | Partner | Opponent | Score | Result |
| 2017 | Korea Masters | Kim Ha-na | Choi Sol-gyu Chae Yoo-jung | 17–21, 21–13, 21–18 | Winner |
| 2017 | Macau Open | Kim Ha-na | Zheng Siwei Huang Yaqiong | 14–21, 11–21 | Runner-up |
| 2017 | U.S. Open | Kim Ha-na | Kim Won-ho Shin Seung-chan | 16–21, 21–14, 21–11 | Winner |
| 2017 | Chinese Taipei Open | Kim Ha-na | Wang Chi-lin Lee Chia-hsin | 22–20, 21–10 | Winner |
BWF International Challenge/Series (2 titles)
Men's doubles| Year | Tournament | Partner | Opponent | Score | Result |
| 2018 | Irish Open | Choi Sol-gyu |  Jack MacGregor Ciar Pringle | 21–17, 21–12 | Winner |
| 2018 | Norwegian International | Choi Sol-gyu |  Mads Emil Christensen Kristoffer Knudsen | 21–12, 21–13 | Winner |