Stadium: Court 4 Round: 19 Ground: Hardcourt outdoor
| Challenger Sydney | 2023/10/28 23:00 | Yusuke Takahashi v Bang Shuo Yin | 6-2,6-3 |
| Challenger Playford | 2023/10/24 02:55 | Thanasi Kokkinakis v Yusuke Takahashi | 6-7,6-3,6-2 |
| Challenger Playford | 2023/10/22 23:30 | Yusuke Takahashi v Ryan Seggerman | 6-3,6-2 |
| Challenger Playford | 2023/10/21 23:30 | Yusuke Takahashi v Shohei Chikami | 6-7,6-3,6-2 |
| Challenger Shenzhen | 2023/10/17 06:40 | James Duckworth v Yusuke Takahashi | 6-3,6-2 |
| ITF M25 Takasaki | 2023/09/19 02:30 | Hiroyasu Ehara v Yusuke Takahashi | 7-5,6-4 |
| ITF M25 Sapporo | 2023/09/12 02:00 | Yusuke Takahashi v Kazuma Kawachi | 6-4,3-6,2-6 |
| Challenger Shanghai | 2023/09/04 04:30 | Yan Bai v Yusuke Takahashi | 6-2,6-4 |
| Challenger Sydney | 2023/10/29 00:20 | Ji Sung Nam v Alexander Klintcharov | 6-2,7-6 |
| Challenger Playford | 2023/10/24 23:30 | Ji Sung Nam v Rinky Hijikata | 4-6,6-7 |
| Challenger Playford | 2023/10/23 00:55 | Thomas Fancutt v Ji Sung Nam | 6-2,2-6,5-7 |
| Challenger Playford | 2023/10/22 02:35 | Mac Kiger v Ji Sung Nam | 7-5,2-6,0-6 |
| Challenger Grodzisk Mazowiecki | 2023/08/13 15:10 | Ji Sung Nam v Mats Rosenkranz | 2-6,3-6 |
| Challenger Meerbusch | 2023/08/08 09:00 | Orlando Luz v Ji Sung Nam | 4-6,6-4,6-4 |
| Challenger Meerbusch | 2023/08/07 14:35 | Aaron James Williams v Ji Sung Nam | 4-6,7-6,1-6 |
| Challenger Porto | 2023/07/30 13:05 | Ji Sung Nam v Jaime Faria | 4-6,4-6 |