Stadium: Court 6 Round: 44 Ground: Hardcourt outdoor
| ITF - M15 Cancun | 2019/08/26 14:30 | Jiaxi Ma v Sam Ryan Ziegann | 6-2,2-6,10-2 |
| ITF - M15 Cancun | 2019/08/19 14:30 | Jiaxi Ma v Sam Ryan Ziegann | 3-6,6-3,10-6 |
| ITF - M15 Anseong | 2019/06/25 01:00 | Hayeon Seong v Sam Ryan Ziegann | 7-5,6-1 |
| ITF - M15 Anseong | 2019/06/24 01:00 | Per Nordstrom v Sam Ryan Ziegann | 3-6,2-6 |
| ITF M15 Gimcheon | 2019/06/17 01:00 | Ren Nakamura v Sam Ryan Ziegann | 2-6,6-2,10-7 |
| ITF M15 Akishima | 2019/06/11 00:00 | Kosuke Okagaki v Sam Ryan Ziegann | 6-1,6-0 |
| ITF M15 Guam | 2019/06/06 00:00 | Soichiro Moritani v Sam Ryan Ziegann | 6-2,6-2 |
| ITF M15 Guam | 2019/06/04 00:00 | Sam Ryan Ziegann v Marcus Kallioniemi | 6-0,6-0 |
| ITF - M15 Cancun | 2019/09/08 21:00 | Ryotaro Matsumura v Sebastian Eguez | 6-2,6-4 |
| ITF - M15 Cancun | 2019/09/08 16:30 | Ryotaro Matsumura v Razvan Baiant | 6-1,6-2 |
| ITF Indonesia F1 | 2018/07/25 04:50 | Ryotaro Matsumura v Hady Habib | 6-4,6-7,3-6 |
| ITF Indonesia F1 Qual | 2018/07/23 03:00 | Jesse Flores v Ryotaro Matsumura | 2-6,7-6,2-6 |
| ITF Indonesia F1 Qual | 2018/07/22 02:00 | Jeremy Nahor v Ryotaro Matsumura | 2-6,0-6 |
| ITF Indonesia F1 Qual | 2018/07/21 02:00 | Jagmeet Singh v Ryotaro Matsumura | 2-6,2-6 |
| ITF Guam F1 | 2018/06/18 03:00 | Ryotaro Matsumura v Niklas Johansson | 4-6,6-3,4-6 |
| ITF Guam F1 | 2018/06/16 04:00 | Ryotaro Matsumura v Joseph W. Van Meter | 6-0,6-1 |