| ITF M25 - Osijek | 2023/08/06 10:00 | Dominique Graf v Marsel Znuderl | 4-6,7-6,10-8 |
| ITF M15 - Novi Sad | 2023/07/31 09:30 | Marsel Znuderl v Gorazd Srbljak | 7-6,3-6,2-10 |
| ITF M15 - Novi Sad | 2023/07/23 07:00 | Marsel Znuderl v Romeo Hadzimehmedovic | 6-4,2-6,11-13 |
| ITF - M15 Celje | 2023/06/27 08:40 | Miha Vetrih v Marsel Znuderl | 6-4,7-6 |
| ITF - M15 Celje | 2023/06/26 15:25 | Marsel Znuderl v Alen Bill | 6-4,6-1 |
| ITF - M25 Kiseljak | 2023/05/30 07:30 | Corey Gaal v Marsel Znuderl | 6-3,6-1 |
| ITF - M25 Kiseljak | 2023/05/29 09:30 | Marsel Znuderl v Kirill Mishkin | 6-7,7-6,11-9 |
| ITF - M15 Osijek | 2023/05/01 13:45 | Marsel Znuderl v Noah Thurner | 4-6,7-6,8-10 |
| ITF - M15 Caloundra | 2023/08/01 03:40 | Kazuki Nishiwaki v Ryotaro Matsumura | 6-3,3-6,6-3 |
| ITF - M15 Caloundra | 2023/07/25 04:15 | Ryotaro Matsumura v Thomas Braithwaite | 3-6,6-4,5-7 |
| ITF - M15 Karuizawa | 2023/06/01 01:45 | Ryotaro Matsumura v Hikaru Shiraishi | 4-6,2-6 |
| ITF - M15 Karuizawa | 2023/05/30 03:30 | Ryotaro Matsumura v Naoki Tajima | 3-6,6-1,6-4 |
| ITF - M15 Addis Ababa | 2023/05/23 12:00 | Nicolas Villalon v Ryotaro Matsumura | 6-4,6-2 |
| ITF - M15 Addis Ababa | 2023/05/18 09:10 | S D Prajwal Dev v Ryotaro Matsumura | 6-3,6-4 |
| ITF - M15 Addis Ababa | 2023/05/17 14:00 | Ryotaro Matsumura v Leonardo Catani | 6-4,6-4 |
| UTR - Pro Miki | 2023/04/15 05:34 | Ryotaro Matsumura v Ryotaro Taguchi | 6-4,3-6,3-6 |