Siyoen Sim
2025
| J200 TAINAN | [2] | Final |
| J100 SEOUL | [1] | Win |
| J100 ANDONG | [1] | Win |
| J300 WANJU | [10] | 1R |
| J200 CHUNCHEON | [7] | Quarter |
| J300 BEIJING | [9] | 3R |
| J100 ALMATY-2 | [5] | 2R |
| J100 ALMATY | [5] | Quarter |
| J300 NONTHABURICLOSEDREGIONALCHAMPIONHSIPS | 2R | |
| J300 KUCHING | 1R | |
| J100 NAIROBI | [2] | Win |
| J60 NAIROBI | [3] | Win |
2024
| J100 NAIROBI-2 | [15] | Win |
| J60 NAIROBI-4 | [11] | Win |
| J100 SEOUL | 2R | |
| J100 ANDONG | 2R | |
| J30 SUNCHANG | [7] | 2R |
| J30 INCHEON | 1R | |
| J30 COLOMBO | Semi |
2023
Nation
KOR
Generation
Born in 2010 (14-15 years old)
World Ranking
Junior World Ranking 119th
Year-end Junior World Ranking
- Year-end 2024 400th
- Year-end 2023 3372th
Match Details
2025 J200 TAINAN
| W | 1R | Pin-Yu Wang | 6-3 6-2 |
| W | 2R | Mai Sasaki | 7-5 6-3 |
| W | QF | Jiwon Hwang | 6-2 6-2 |
| W | SF | Ui Su Jeong | 6-2 6-2 |
| L | F | Yeri Hong | 4-6 3-6 |
2025 J100 SEOUL
| W | 1R | Eliana Kook | 6-2 6-4 |
| W | 2R | Yebin Jeon | 6-1 6-2 |
| W | QF | Yerin Lee | 6-3 7-5 |
| W | SF | Yerin Lim | 6-1 6-1 |
| W | F | Ekaterina Dotsenko | 6-3 7-5 |
2025 J100 ANDONG
| W | 1R | Yebin Jeon | 7-5 6-3 |
| W | 2R | Sohee Choi | 6-1 6-2 |
| W | QF | Yerin Lim | 6-3 7-5 |
| W | SF | Hyejeong Ahn | 6-2 6-3 |
| W | F | Ui Su Jeong | 6-4 6-4 |
2025 J300 WANJU
| L | 1R | Ziyu Zhou | 4-6 3-6 |
2025 J200 CHUNCHEON
| W | 1R | Albina Kakenova | 6-1 6-1 |
| W | 2R | Sunmin Ahn | 6-3 6-1 |
| L | QF | Kristina Penickova | 0-6 3-6 |
2025 J300 BEIJING
| W | 2R | Qianyu Dong | 6-1 6-2 |
| L | 3R | Yu-Chen Lin | 2-6 6-4 3-6 |
2025 J100 ALMATY-2
| L | 2R | Kristina Kamolova | 6-7 6-1 1-6 |
2025 J100 ALMATY
| W | 2R | Sofia Vasiltsova | 6-4 6-4 |
| W | 3R | Diya Chaudhary | 6-1 6-1 |
| L | QF | Zhang-Qian Wei | 6-7 2-6 |
2025 J300 NONTHABURICLOSEDREGIONALCHAMPIONHSIPS
| W | 1R | Pimlaphat Lim | 6-1 6-4 |
| L | 2R | Zhang-Qian Wei | 1-6 4-6 |
2025 J300 KUCHING
| L | 1R | Nelli Ivanova | 6-7 5-7 |
2025 J100 NAIROBI
| 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 J60 NAIROBI
| 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 J100 NAIROBI-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 J60 NAIROBI-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 J100 SEOUL
| W | 1R | Eunjin Ryu | 6-4 6-4 |
| L | 2R | Ran Wakana | 1-6 6-2 5-7 |
2024 J100 ANDONG
| W | 1R | Kristina Tai | 6-2 6-2 |
| L | 2R | Suha Lee | 4-6 0-6 |
2024 J30 SUNCHANG
| W | 1R | Paramee Tadkaew | 6-1 7-5 |
| L | 2R | Jay Lee | 6-4 3-6 3-6 |
2024 J30 INCHEON
| L | 1R | Sebin Eom | 1-6 3-6 |
2024 J30 COLOMBO
| 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 J30 YEONGWOL
| 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: 10179, Number of registered players: 6,443, Number of registered results: 375,166