Ground: Hardcourt outdoor
| ITF M15 Cancun | 2020/03/09 14:00 | Sam Ryan Ziegann v Ryotaro Matsumura | 2-6,2-6 |
| ITF M15 Cancun | 2019/09/09 15:00 | Sam Ryan Ziegann v Ryotaro Matsumura | 2-6,3-6 |
| ITF M15 Yanagawa | 2023/12/27 00:30 | Mikalai Haliak v Ryotaro Matsumura | 6-3,6-3 |
| ITF M15 Yanagawa | 2023/12/26 00:30 | Ryotaro Matsumura v Shu Matsuoka | 6-2,6-1 |
| ITF M15 Yanagawa | 2023/12/22 02:10 | Kazuma Kawachi v Ryotaro Matsumura | 6-4,4-6,6-4 |
| ITF M15 Yanagawa | 2023/12/20 02:30 | Hiroki Sakagawa v Ryotaro Matsumura | 2-6,1-6 |
| ITF M25 Dharwad | 2023/10/18 09:25 | Kazuki Nishiwaki v Ryotaro Matsumura | 6-2,7-5 |
| ITF M15 Ahmedabad | 2023/10/10 03:30 | Digvijay Pratap Singh v Ryotaro Matsumura | 6-2,6-4 |
| ITF M25 Takasaki | 2023/09/21 02:00 | Ryotaro Matsumura v Sora Fukuda | 1-6,1-6 |
| ITF M25 Takasaki | 2023/09/20 01:00 | Ryotaro Matsumura v Toru Horie | 6-0,5-7,7-6 |
| ITF M15 Papamoa | 2023/12/19 21:00 | Harrison Adams v Sam Ryan Ziegann | 6-2,6-1 |
| ITF M15 Papamoa | 2023/12/19 00:30 | Sam Ryan Ziegann v Thomas Nicholas Gadecki | 6-3,4-6,7-6 |
| ITF M15 Papamoa | 2023/12/17 22:30 | Harry Pugh v Sam Ryan Ziegann | 2-6,6-7 |
| ITF M25 Gold Coast | 2023/11/28 00:00 | Mason Naumovski v Sam Ryan Ziegann | 6-3,4-6,11-9 |
| ITF M25 Gold Coast | 2023/11/27 01:30 | Sam Ryan Ziegann v Oren Vasser | 6-1,6-1 |
| ITF M25 Brisbane | 2023/11/19 02:30 | Sam Ryan Ziegann v Mason Naumovski | 1-6,2-6 |
| ITF M25 Cairns | 2023/10/11 00:00 | Omar Jasika v Sam Ryan Ziegann | 6-0,6-3 |
| ITF M25 Cairns | 2023/10/10 05:00 | Alexander Klintcharov v Sam Ryan Ziegann | 3-6,4-6 |