Sion Ji
2025
| J60Kathmandu-2 | [4] | 2R |
| J60Kathmandu | [4] | Semi |
| J60Singapore | [2] | Semi |
| J30Singapore | [1] | Win |
2024
| J30Islamabad-4 | [4] | Final |
| J30Islamabad-3 | [4] | Win |
| J300Wanju | 2R | |
| J100Seoul | 1R | |
| J60Lautoka | [11] | 2R |
| J60Yanggu-Gun | Quarter | |
| J60Gimcheon | 2R | |
| J30Sunchang | 2R | |
| J30Incheon | 1R | |
| J60Andong | 1R | |
| J30Yeongwol | 2R |
2023
Nation
KOR
Generation
Born in 2008 (16-17 years old)
World Ranking
Junior World Ranking 454th
Year-end Junior World Ranking
- Year-end 2024 834th
- Year-end 2023 4232th
Match Details
2025 J60Kathmandu-2
| L | 2R | Pranav Manandhar | - - - |
2025 J60Kathmandu
| W | 2R | Pangya Pholphirul | 6-0 6-1 |
| W | 3R | Pranav Manandhar | 6-2 6-1 |
| W | QF | Rayen Zerai | 6-4 6-0 |
| L | SF | Kai Thompson | 3-6 0-6 |
2025 J60Singapore
| W | 1R | Ziqi Li | 6-2 6-1 |
| W | 2R | Showrya Samala | 6-4 6-1 |
| W | QF | Michal Ihsan Wicaksana | 6-2 6-4 |
| L | SF | Jun Hao Luo | 6-2 4-6 2-6 |
2025 J30Singapore
| W | 1R | Runqi Yang | 6-2 6-3 |
| W | 2R | Raphael Rio Suryana | 4-2 4-1 |
| W | QF | Ethan David Zapp | 4-1 4-2 |
| W | SF | Sungmin Lee | 4-1 5-3 |
| W | F | Min Hyuk Cho | 3-6 6-4 6-2 |
2024 J30Islamabad-4
| W | 1R | Yota Nishikori | 6-4 6-2 |
| W | 2R | Aahil Kaleel | 6-2 6-2 |
| W | QF | Youngchae Oh | 6-1 6-0 |
| W | SF | Ahmad Nael Qureshi | 6-4 6-4 |
| L | F | Xiuyuan Guo | 6-7 2-6 |
2024 J30Islamabad-3
| W | 1R | Abubakar Talha | 7-5 6-3 |
| W | 2R | Danthai Takong | 6-3 6-0 |
| W | QF | Seung Woo Han | 6-0 6-0 |
| W | SF | Nadir Mirza | 6-4 3-6 7-5 |
| W | F | Xiuyuan Guo | 6-4 3-6 6-1 |
2024 J300Wanju
| W | 1R | Nikita Nikolenko | 6-2 6-3 |
| L | 2R | Rethin Pranav Senthil Kumar | 2-6 3-6 |
2024 J100Seoul
| L | 1R | Dongjae Kim | 6-7 7-6 6-7 |
2024 J60Lautoka
| L | 2R | Daniel Bosco Wilfred | - - - |
2024 J60Yanggu-Gun
| W | 1R | Pranav Mahesh Saravanakumar | 6-1 6-1 |
| W | 2R | Minwoo Kim | 6-3 6-3 |
| L | QF | Min Ho Ko | 3-6 1-6 |
2024 J60Gimcheon
| W | 1R | Jisung Lee | 6-3 6-0 |
| L | 2R | Min Hyuk Cho | 2-6 2-6 |
2024 J30Sunchang
| W | 1R | Mao Tazuru | 6-2 2-6 7-5 |
| L | 2R | Dongmin Kim | 2-6 3-6 |
2024 J30Incheon
| L | 1R | Seungjun Yu | 4-6 2-6 |
2024 J60Andong
| L | 1R | Wonmin Kim | 6-2 3-6 1-6 |
2024 J30Yeongwol
| W | 1R | Seung-Min Oh | 6-0 6-2 |
| L | 2R | Ju Hun Choo | 6-4 2-6 2-6 |
2023 J30Cholpon-Ata-4
| L | 1R | Artur Ibragimov | 3-6 2-6 |
Junior Tennis Database is a site that summarizes the results of ITF junior tennis tournaments.
Number of registered tournaments: 5778, Number of registered players: 4,878, Number of registered results: 222,253