Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| Challenger Yokohama | 2023/11/20 03:30 | Giovanni Fonio v Colin Sinclair | 3-6,7-5,6-7 |
| Challenger Yokohama | 2023/11/19 07:55 | Nathan Ponwith v Colin Sinclair | 3-6,6-7 |
| Challenger Kobe | 2023/11/12 01:00 | James Trotter v Colin Sinclair | 6-4,7-5 |
| Challenger Sydney | 2023/10/30 04:05 | Colin Sinclair v Marc Polmans | 4-6,2-6 |
| Challenger Shenzhen | 2023/10/19 07:55 | Colin Sinclair v Lorenzo Giustino | 3-6,4-6 |
| Challenger Shenzhen | 2023/10/16 07:00 | Evgeny Donskoy v Colin Sinclair | 6-2,3-6,4-6 |
| Challenger Shenzhen | 2023/10/11 03:40 | Thanasi Kokkinakis v Colin Sinclair | 6-2,3-6,6-3 |
| Challenger Shenzhen | 2023/10/10 04:00 | Colin Sinclair v Tsung-Hao Huang | 3-6,6-4,6-2 |
| Challenger Yokohama | 2023/11/20 01:00 | Mathys Erhard v Naoki Nakagawa | 6-4,3-6,4-6 |
| Challenger Kobe | 2023/11/12 01:00 | Mathys Erhard v Rio Noguchi | 4-6,0-6 |
| ITF M15 Monastir | 2023/10/26 13:50 | Mathys Erhard v Filippo Mazzola | 6-7,6-1,6-1 |
| ITF M15 Monastir | 2023/10/25 12:30 | Mathys Erhard v Max Wiskandt | 4-6,6-2,7-5 |
| ITF M25 Zaragoza | 2023/10/07 10:45 | Felix Gill v Mathys Erhard | 6-3,6-4 |
| ITF M25 Zaragoza | 2023/10/06 13:10 | Ryan Nijboer v Mathys Erhard | 6-0,4-6,4-6 |
| ITF M25 Zaragoza | 2023/10/05 11:10 | Samuel Brosset v Mathys Erhard | 2-6,5-7 |
| ITF M25 Zaragoza | 2023/10/04 08:25 | Nicola Kuhn v Mathys Erhard | 2-6,5-7 |