Yoo Siwoo: results and match history
Record
| Year | Wins | Losses |
|---|---|---|
| 2026 | 12 | 9 |
| Total | 12 | 9 |
Matches by tournament
WTT Star Contender Astana 2026 - President’s Cup September 15–20, 2026
| L | Mixed doubles Semifinals | Kobayashi Hiromu / Kihara Miyuu JPN vs Park Ganghyeon / Yoo Siwoo KOR 3-0 11-3, 12-10, 11-6 |
| W | Mixed doubles Quarterfinals | Evgeny Tikhonov / Maria Panfilova RUS vs Park Ganghyeon / Yoo Siwoo KOR 1-3 11-9, 3-11, 8-11, 8-11 |
| L | Women's singles Round of 64 | Yoo Siwoo KOR vs Ece Harac TUR 0-3 5-11, 8-11, 7-11 |
| W | Mixed doubles Round of 16 | Park Ganghyeon / Yoo Siwoo KOR vs Patrick Franziska / Adriana Diaz GER/PUR 3-2 6-11, 7-11, 11-8, 11-9, 11-8 |
WTT Feeder Vientiane 2026 August 4–8, 2026
| L | Women's singles Quarterfinals | Yoo Siwoo KOR vs Kim Seongjin KOR 0-3 9-11, 4-11, 3-11 |
| W | Women's singles Round of 16 | Chen Szu-Yu TPE vs Yoo Siwoo KOR 1-3 9-11, 9-11, 11-5, 7-11 |
| L | Mixed doubles Quarterfinals | Li Ki Ho / Yuen Sum Lok HKG vs Nam Seongbeen / Yoo Siwoo KOR 3-1 11-7, 5-11, 12-10, 11-7 |
| W | Women's singles Round of 32 | Kim Hayeong KOR vs Yoo Siwoo KOR 2-3 11-4, 11-6, 7-11, 12-14, 7-11 |
| L | Women's doubles Round of 16 | Yoo Siwoo / Lee Zion KOR vs Chen Szu-Yu / Wu Ying Syuan TPE 1-3 7-11, 13-15, 11-9, 9-11 |
| W | Mixed doubles Round of 16 | Nam Seongbeen / Yoo Siwoo KOR vs Sarayut Tancharoen / Wanwisa Aueawiriyayothin THA 3-0 11-5, 11-6, 11-6 |
WTT Star Contender Ljubljana 2026 June 16–21, 2026
| L | Women's singles Qualifying round 2 | Yang Yiyun CHN vs Yoo Siwoo KOR 3-0 11-5, 11-3, 11-5 |
| W | Women's singles Qualifying round 1 | Lara Opeka SLO vs Yoo Siwoo KOR 0-3 7-11, 9-11, 8-11 |
WTT Contender Zagreb 2026 June 9–14, 2026
| L | Women's singles Qualifying round 4 | Yoo Siwoo KOR vs Han Feier CHN 0-3 8-11, 6-11, 4-11 |
| W | Women's singles Qualifying round 3 | Tsai Yun-En TPE vs Yoo Siwoo KOR 1-3 6-11, 7-11, 11-7, 6-11 |
| W | Women's singles Qualifying round 2 | Yoo Siwoo KOR vs Ryu Hanna KOR 3-1 2-11, 11-7, 11-9, 11-3 |
WTT Contender Skopje 2026 June 1–7, 2026
| L | Women's singles Round of 16 | Odo Satsuki JPN vs Yoo Siwoo KOR 3-1 11-3, 11-7, 7-11, 11-2 |
| W | Women's singles Round of 32 | Yoo Siwoo KOR vs Reka Bezeg SRB 3-0 11-8, 11-7, 11-9 |
| L | Mixed doubles Round of 16 | Park Ganghyeon / Yoo Siwoo KOR vs Lubomir Pistej / Sarah De Nutte SVK/LUX 0-3 8-11, 9-11, 8-11 |
| W | Women's singles Qualifying, elimination round | Kimura Kasumi JPN vs Yoo Siwoo KOR 1-3 12-10, 10-12, 13-15, 7-11 |
| W | Women's singles Group 4 | Ng Wing Lam HKG vs Yoo Siwoo KOR 2-3 15-17, 12-10, 11-8, 9-11, 8-11 |
| W | Women's singles Group 4 | Yoo Siwoo KOR vs Choi Seoyeon KOR 3-1 11-7, 11-8, 4-11, 11-5 |
Source: WTT official results. Updated October 31, 2026. worldtabletennis.com