Stadium: Green Tennis Plaza - Court 07 Round: 28 Ground: Hardcourt outdoor
Referee:
| UTR Pro Urayasu | 2025/05/21 04:40 | Mattias Southcombe v Christopher Kosei Ono | 3-6,4-6 |
| UTR Pro Yokohama | 2025/08/14 03:10 | Christopher Kosei Ono v Katsutoshi Suzuki | 3-6,2-6 |
| UTR Pro Yokohama | 2025/08/13 10:40 | Christopher Kosei Ono v Ryotaro Matsumura | 2-6,1-6 |
| UTR Pro Yokohama | 2025/08/13 03:50 | Christopher Kosei Ono v Gaku Nayuki | 6-3,6-4 |
| UTR Pro Yokohama | 2025/08/12 01:55 | Christopher Kosei Ono v Jonathan Irwanto | 0-6,0-6 |
| UTR Pro Taiwan | 2025/07/05 03:30 | Christopher Kosei Ono v Jay Fairclough | 6-2,2-6,6-3 |
| UTR Pro Taiwan | 2025/07/04 05:25 | Chen-Yu Lu v Christopher Kosei Ono | 5-7,3-6 |
| UTR Pro Taiwan | 2025/07/03 05:10 | Yu-Shun Lai v Christopher Kosei Ono | 1-6,1-6 |
| UTR Pro Taiwan | 2025/07/01 03:50 | Finley Dyer v Christopher Kosei Ono | 6-3,7-6 |
| UTR Pro Taiwan | 2025/06/08 01:30 | Mattias Southcombe v Drona Walia | 6-0,3-6,2-6 |
| UTR Pro Urayasu | 2025/05/24 02:15 | Mattias Southcombe v Ko Nagashima | 6-1,7-6 |
| UTR Pro Urayasu | 2025/05/23 05:20 | Mattias Southcombe v Haru Kawanaka | 6-2,3-6,6-3 |
| UTR Pro Urayasu | 2025/05/22 04:00 | Mattias Southcombe v Maximus Z Wong | 5-7,6-4,3-6 |
| UTR Pro Urayasu | 2025/05/21 04:40 | Mattias Southcombe v Christopher Kosei Ono | 3-6,4-6 |
| UTR Pro Urayasu | 2025/05/20 01:00 | Mattias Southcombe v Kotaro Mochizuki | 3-6,4-6 |
| UTR Pro Urayasu | 2025/05/19 04:00 | Mattias Southcombe v Gaku Nayuki | 6-4,3-6,6-4 |
| ITF M15 Sharm El Sheikh | 2025/02/26 10:22 | Martin Damm v Mattias Southcombe | 6-1,7-5 |