Stadium: Center Court A Round: 25 Ground: Hardcourt outdoor
| Wimbledon | 2023/06/26 14:00 | Dimitar Kuzmanov v Hyeon Chung | 2-6,6-3,3-6 |
| Challenger Nottingham | 2023/06/13 13:55 | Nuno Borges v Hyeon Chung | 6-3,6-2 |
| Challenger Surbiton | 2023/06/05 12:40 | Hyeon Chung v Andy Murray | 3-6,2-6 |
| Challenger Busan | 2023/05/09 03:30 | Hyeon Chung v Yasutaka Uchiyama | 3-6,7-6,2-6 |
| Challenger Seoul | 2023/04/26 03:20 | Hyeon Chung v Jordan Thompson | 2-6,4-6 |
| French Open | 2020/09/23 14:50 | Hyeon Chung v Renzo Olivo | 6-7,2-6 |
| French Open | 2020/09/22 09:55 | Baptiste Crepatte v Hyeon Chung | 6-7,4-6 |
| Challenger Prostejov | 2020/09/07 14:20 | Jozef Kovalik v Hyeon Chung | 7-6,6-2 |
| ITF M15 Tokyo | 2024/07/10 06:15 | Kenta Miyoshi v Hiromasa Koyama | 6-1,6-2 |
| ITF M15 Tokyo | 2024/07/03 03:30 | Hiromasa Koyama v Ryotaro Matsumura | 4-6,5-7 |
| ITF M15 Hinode | 2024/03/11 01:00 | Hiromasa Koyama v Hong Kit Wong | 7-6,3-6,4-10 |
| UTR Pro Noda | 2023/08/26 00:00 | Hiromasa Koyama v Paul Howe | 6-7,6-7 |
| UTR Pro Noda | 2023/08/25 00:00 | Hiromasa Koyama v Hiiro Sakamoto | 1-6,1-6 |
| UTR Pro Noda | 2023/08/23 06:30 | Hiromasa Koyama v Yuta Tomida | 1-6,3-6 |
| UTR Pro Osaka | 2023/07/30 04:30 | Koki Ohnuma v Hiromasa Koyama | 6-3,5-2 |
| UTR Pro Osaka | 2023/07/28 06:54 | Hiromasa Koyama v Ryoma Matsushita | 1-6,2-6 |