Woohyuk Chang
2023
| J300 WANJU | [15] | 3R |
| J300 BEAULIEU-SUR-MER | 1R | |
| J300 VILLENA | [12] | 3R |
| J300 CASABLANCA | 1R | |
| J200 VALENCIA | [2] | Quarter |
| AUSTRALIAN OPEN JUNIOR | 1R | |
| J300 TRARALGON | 1R |
2022
| JB1 OSAN-ASIACLOSED | [4] | Semi |
| J2 CHUNCHEON | [4] | 1R |
| JAOSAKA | [11] | 3R |
| JB1 PUNE | [4] | Quarter |
| J3 TASHKENT-2 | [3] | 3R |
| J3 TASHKENT | [3] | Win |
| J4 SUNCHANG | [1] | Quarter |
| J3 RABAT | [3] | 2R |
| J1 CASABLANCA | 2R | |
| J1 NONTHABURI | Quarter | |
| J2 KOLKATA | 2R | |
| J2 CHANDIGARH | Quarter |
2021
| J4 OSAN | [2] | Semi |
| J5 ANDONG-2 | [2] | Quarter |
| J4 YANGGU | [2] | Final |
| J4 NAIROBI-3 | [1] | Quarter |
| J5 NAIROBI-3 | [7] | Win |
| J5 NAIROBI-2 | [7] | Win |
| J5 GIMCHEON | Semi | |
| J5 SUNCHANG | Quarter |
2020
| J5 YANGGU-2 | Quarter | |
| J5 ANDONG | 1R | |
| J5 SUNCHANG-3 | 2R |
Nation
KOR
Generation
Born in 2005 (19-20 years old)
Year-end Junior World Ranking
- Year-end 2023 498th
- Year-end 2022 95th
- Year-end 2021 384th
- Year-end 2020 1902th
Match Details
2023 J300 WANJU
| W | 1R | Iliyas Maratuly | 2-6 6-1 6-3 |
| W | 2R | Harry Pugh | 6-2 6-7 6-0 |
| L | 3R | Charlie Camus | 4-6 6-4 1-6 |
2023 J300 BEAULIEU-SUR-MER
| L | 1R | Manas Dhamne | 2-6 2-6 |
2023 J300 VILLENA
| W | 2R | Miguel Avendano Cadena | 6-4 6-4 |
| L | 3R | Andres Santamarta Roig | 2-6 1-6 |
2023 J300 CASABLANCA
| L | 1R | Branko Djuric | 3-6 3-6 |
2023 J200 VALENCIA
| W | 1R | William Rejchtman Vinciguerra | 6-1 7-6 |
| W | 2R | Alejandro Juan Mano | 6-3 7-6 |
| L | QF | Ignacio Parisca | 2-6 0-6 |
2023 AUSTRALIAN OPEN JUNIOR
| L | 1R | Jakub Filip | 0-6 2-6 |
2023 J300 TRARALGON
| L | 1R | Thomas Nicholas Gadecki | 6-1 4-6 1-6 |
2022 JB1 OSAN-ASIACLOSED
| W | 1R | Jaishnav Shinde | 1-6 7-5 6-1 |
| W | 2R | Bill Chan | 6-3 6-2 |
| W | 3R | Shingo Masuda | 7-6 5-7 6-0 |
| W | QF | Seungmin Park | 6-3 6-0 |
| L | SF | Hoyoung Roh | 3-6 2-6 |
2022 J2 CHUNCHEON
| L | 1R | Chan Hee Han | 2-6 4-6 |
2022 JAOSAKA
| W | 1R | Yuya Ando | 7-6 6-2 |
| W | 2R | Satoru Nakajima | 2-6 6-3 6-1 |
| L | 3R | Asahi Harazaki | 3-6 1-6 |
2022 JB1 PUNE
| W | 1R | Satoru Nakajima | 6-0 3-6 6-4 |
| W | 2R | Denim Yadav | 6-2 6-1 |
| L | QF | Aryan Shah | 4-6 4-6 |
2022 J3 TASHKENT-2
| W | 2R | Abdulaziz Usmonjonov | 6-0 6-2 |
| L | 3R | Stepan Zhoromsky | 4-6 6-4 4-6 |
2022 J3 TASHKENT
| W | 2R | Ilya Maltsev | 6-4 6-1 |
| W | 3R | Matteo Covato | 6-2 6-2 |
| W | QF | Said Akbarov | 6-3 4-6 6-3 |
| W | SF | Yuvan Nandal | 6-4 1-6 6-3 |
| W | F | Amir Milushev | 6-2 1-6 6-3 |
2022 J4 SUNCHANG
| W | 1R | Dong Geon Kim | 3-6 6-4 6-3 |
| W | 2R | Hyeon Seok Seo | 6-1 6-1 |
| L | QF | Donghyun Hwang | 1-6 2-6 |
2022 J3 RABAT
| W | 1R | David Schwarc | 6-4 6-1 |
| L | 2R | Jack Loge | 6-7 2-6 |
2022 J1 CASABLANCA
| W | 1R | Mohammed Nabihi | 6-1 6-2 |
| L | 2R | Paul Inchauspe | 4-6 0-6 |
2022 J1 NONTHABURI
| W | 1R | Zach Stephens | 6-3 6-1 |
| W | 2R | Denim Yadav | 7-6 6-2 |
| W | 3R | Ivan Sodan | 3-6 6-2 7-6 |
| L | QF | Jack Loutit | 3-6 2-6 |
2022 J2 KOLKATA
| W | 1R | Chirag Duhan | 7-5 6-4 |
| L | 2R | Ruslan Tiukaev | 6-3 0-6 4-6 |
2022 J2 CHANDIGARH
| W | 1R | Sarthak Arora | 6-2 6-2 |
| W | 2R | Aryan Shah | 6-3 6-3 |
| L | QF | Bushan Haobam | 4-6 4-6 |
2021 J4 OSAN
| W | 1R | Seungmin Park | 6-1 6-0 |
| W | 2R | Jiho Lee | 6-2 7-5 |
| W | QF | Minjoon Kim | 6-2 6-4 |
| L | SF | Hoyoung Roh | 5-7 4-6 |
2021 J5 ANDONG-2
| W | 1R | Se Hyuk Cho | 6-1 6-2 |
| W | 2R | Juan Kim | 6-3 6-0 |
| L | QF | Donghyun Hwang | 3-6 6-7 |
2021 J4 YANGGU
| W | 1R | Kyubin Sakong | 6-3 6-1 |
| W | 2R | Jiho Lee | 6-4 6-1 |
| W | QF | Minjoon Kim | 6-3 6-4 |
| W | SF | Taewan Joo | 6-3 6-1 |
| L | F | Jangjun Kim | 3-6 1-6 |
2021 J4 NAIROBI-3
| W | 1R | Mudiwa Munyimani | 6-1 6-2 |
| W | 2R | Yannick Maser | 6-3 6-1 |
| L | QF | Hussein El Tawil | 4-6 4-6 |
2021 J5 NAIROBI-3
| W | 1R | Paris Pouatcha | 6-0 6-2 |
| W | 2R | Alfons Ridstrom | 6-4 6-3 |
| W | QF | Oscar Bain Moreno De Vega | 6-4 6-3 |
| W | SF | George Russell | 3-6 7-6 6-1 |
| W | F | Dhillon Virdee Oakley | 6-1 7-6 |
2021 J5 NAIROBI-2
| W | 1R | Raymond Oduor | 6-1 6-2 |
| W | 2R | Yassin Hamed | 6-1 6-3 |
| W | QF | Kael Shalin Shah | 6-7 6-4 6-3 |
| W | SF | Oscar Bain Moreno De Vega | 6-0 6-3 |
| W | F | Jiang Yunhan | 7-5 6-4 |
2021 J5 GIMCHEON
| W | 1R | Yoontaek Lee | 6-1 6-1 |
| W | 2R | Seungmin Park | 7-5 6-2 |
| W | QF | Sooyoung Yang | 6-2 7-6 |
| L | SF | Jangjun Kim | 4-6 4-6 |
2021 J5 SUNCHANG
| W | 1R | Dong Hwan Kim | 6-1 6-2 |
| W | 2R | Hoyoung Roh | 4-6 6-2 6-2 |
| L | QF | Haesun Lee | 6-0 5-7 4-6 |
2020 J5 YANGGU-2
| W | 1R | Kyubin Sakong | 6-1 6-3 |
| W | 2R | Min Ki Jo | 6-3 7-5 |
| L | QF | Hyeoung Jin Kim | 5-7 3-6 |
2020 J5 ANDONG
| L | 1R | Min Seong Kim | 3-6 0-6 |
2020 J5 SUNCHANG-3
| W | 1R | Wooin Lee | 6-1 6-0 |
| L | 2R | Minjoon Kim | 1-6 3-6 |
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