Stadium: Court 6 Round: 44 Ground: Hardcourt outdoor
| ITF M15 Cancun | 2019/08/26 14:30 | Ma, Jiaxi v Sam Ryan Ziegann | 6-2,2-6,10-2 |
| ITF M15 Cancun | 2019/08/19 14:30 | Ma, Jiaxi v Sam Ryan Ziegann | 3-6,6-3,10-6 |
| ITF M15 Anseong | 2019/06/25 01:00 | Ha Yeon, Sung v Sam Ryan Ziegann | 7-5,6-1 |
| ITF M15 Anseong | 2019/06/24 01:00 | Nordstrom, Per v Sam Ryan Ziegann | 3-6,2-6 |
| Gimcheon, Singles M-ITF-KOR-03A | 2019/06/17 01:00 | Ren Nakamura v Sam Ryan Ziegann | 2-6,6-2,10-7 |
| Akishima, Singles M-ITF-JPN-08A | 2019/06/11 00:00 | Okagaki, Kosuke v Sam Ryan Ziegann | 6-1,6-0 |
| Guam, Singles M-ITF-GUM-01A | 2019/06/06 00:00 | Moritani, Soichiro v Sam Ryan Ziegann | 6-2,6-2 |
| Guam, Singles M-ITF-GUM-01A | 2019/06/04 00:00 | Sam Ryan Ziegann v Kallioniemi, Marcus | 6-0,6-0 |
| ITF M15 Cancun | 2019/09/08 21:00 | Ryotaro Matsumura v Eguez, Sebastian | 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 | Nahor, Jeremy 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 Johansson, Niklas | 4-6,6-3,4-6 |
| ITF Guam F1 | 2018/06/16 04:00 | Ryotaro Matsumura v van Meter, Joseph W | 6-0,6-1 |