Siyoen Sim
2025
| J300Kuching | 1R | |
| J100Nairobi | [2] | Win |
| J60Nairobi | [3] | Win |
2024
| J100Nairobi-2 | [15] | Win |
| J60Nairobi-4 | [11] | Win |
| J100Seoul | 2R | |
| J100Andong | 2R | |
| J30Sunchang | [7] | 2R |
| J30Incheon | 1R | |
| J30Colombo | Semi |
2023
Nation
KOR
Generation
Born in 2010 (14-15 years old)
World Ranking
Junior World Ranking 214th
Year-end Junior World Ranking
- Year-end 2024 400th
- Year-end 2023 3372th
Match Details
2025 J300Kuching
| L | 1R | Nelli Ivanova | 6-7 5-7 |
2025 J100Nairobi
| W | 2R | Saaya Sakashita | 6-2 6-1 |
| W | 3R | Daniel Baranes | 6-1 7-6 |
| W | QF | Ching Ying Chen | 6-2 6-7 6-2 |
| W | SF | Amane Hattori | 6-2 6-2 |
| W | F | Shira Dvir | 6-2 6-0 |
2025 J60Nairobi
| W | 2R | Fuari Otani | 6-3 6-1 |
| W | 3R | Stacy Chepkemei Yego | 6-1 6-1 |
| W | QF | Yasmine Douyeb | 6-3 6-0 |
| W | SF | Rito Arima | 7-6 6-4 |
| W | F | Daniel Baranes | 6-4 7-6 |
2024 J100Nairobi-2
| W | 2R | Aradhyaa Verma | 6-3 6-0 |
| W | 3R | Aleksija Neskovic | 7-5 6-4 |
| W | QF | Ena Ilic | 6-3 6-1 |
| W | SF | Nehira Sanon | 6-2 6-4 |
| W | F | Laura Valentine Pop | 6-3 1-6 6-3 |
2024 J60Nairobi-4
| W | 2R | Mercyline Oresha | 6-1 6-0 |
| W | 3R | Sreenidhi Balaji | 6-1 3-6 6-3 |
| W | QF | Aleksija Neskovic | 7-6 6-4 |
| W | SF | Ena Ilic | 6-2 6-0 |
| W | F | Aishwarya Jadhav | 6-7 6-4 7-6 |
2024 J100Seoul
| W | 1R | Eunjin Ryu | 6-4 6-4 |
| L | 2R | Ran Wakana | 1-6 6-2 5-7 |
2024 J100Andong
| W | 1R | Kristina Tai | 6-2 6-2 |
| L | 2R | Suha Lee | 4-6 0-6 |
2024 J30Sunchang
| W | 1R | Paramee Tadkaew | 6-1 7-5 |
| L | 2R | Jay Lee | 6-4 3-6 3-6 |
2024 J30Incheon
| L | 1R | Sebin Eom | 1-6 3-6 |
2024 J30Colombo
| W | 1R | Diya Chaudhary | 6-3 6-1 |
| W | 2R | Dinara De Silva | 6-4 6-4 |
| W | QF | Nonoka Shimizu | 6-1 6-3 |
| L | SF | Felitsata Dorofeeva-Rybas | 6-7 7-6 3-6 |
2023 J30Yeongwol
| W | 1R | Martaa Chogsomjav | 6-3 6-3 |
| L | 2R | Hyejeong Ahn | 4-6 2-6 |
Junior Tennis Database is a site that summarizes the results of ITF junior tennis tournaments.
Number of registered tournaments: 5774, Number of registered players: 3,011, Number of registered results: 222,093