| 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 |
| UTR Pro Kawaguchi | 2024/06/27 04:20 | Ryotaro Matsumura v Haruki Katsushima | 6-1,5-1 |
| UTR Pro Kawaguchi | 2024/06/26 03:30 | Ryotaro Matsumura v Tomislav E Papac | 6-0,6-2 |
| UTR Pro Kawaguchi | 2024/06/25 01:30 | Ryotaro Matsumura v Seiya Nakanishi | 6-1,6-0 |
| UTR Pro Kawaguchi | 2024/06/24 06:30 | Ryotaro Matsumura v Kosuke Nakanishi | 6-4,6-2 |
| ITF M15 Karuizawa | 2024/06/01 02:20 | Tomohiro Masabayashi v Ryotaro Matsumura | 6-0,6-2 |
| ITF M15 Karuizawa | 2024/05/30 03:20 | Ryotaro Matsumura v Kazuki Nishiwaki | 6-4,6-2 |
| ITF M15 Karuizawa | 2024/05/29 02:00 | Ryotaro Matsumura v Taiyo Yamanaka | 6-3,4-6,12-10 |
| ITF M25 Anning | 2024/05/21 04:30 | Ryotaro Matsumura v Nico Hornitschek | 3-6,1-6 |
| UTR Pro Kawaguchi | 2024/06/27 00:30 | Sam Ryan Ziegann v Elijah Cham | 7-6,7-5 |
| UTR Pro Kawaguchi | 2024/06/26 03:17 | Sam Ryan Ziegann v Hiiro Sakamoto | 6-4,6-4 |
| UTR Pro Kawaguchi | 2024/06/25 04:49 | Sam Ryan Ziegann v Brody Nejedly-Krall | 4-6,5-7 |
| UTR Pro Kawaguchi | 2024/06/24 05:25 | Sam Ryan Ziegann v Taiyo Kurata | 6-7,7-6,6-0 |
| ITF M25 Changwon | 2024/06/19 06:35 | Yusuke Takahashi v Sam Ryan Ziegann | 6-0,6-1 |
| ITF M25 Changwon | 2024/06/18 05:55 | Sam Ryan Ziegann v Homin Kwag | 6-1,3-6,11-9 |
| ITF M25 Changwon | 2024/06/17 02:00 | Sam Ryan Ziegann v Sooyoung Yang | 6-1,6-4 |
| ITF M25 Changwon | 2024/06/16 01:00 | Sam Ryan Ziegann v Duhyun Eum | 6-2,6-4 |