Round: 44 Ground: Hardcourt outdoor
| ITF M15 Cancun | 2019/09/09 15:00 | Sam Ryan Ziegann v Ryotaro Matsumura | 2-6,3-6 |
| ITF M15 Te Anau | 2019/12/31 05:15 | Sam Ryan Ziegann v Shuichi Sekiguchi | 2-6,3-6 |
| ITF M25 Toowoomba | 2019/10/05 23:30 | Nicholas Horton v Sam Ryan Ziegann | 7-6,0-6,14-12 |
| ITF M25 Brisbane | 2019/09/29 02:00 | Sam Ryan Ziegann v Nicholas Horton | 2-6,4-6 |
| ITF M15 Cancun | 2019/09/09 15:00 | Sam Ryan Ziegann v Ryotaro Matsumura | 2-6,3-6 |
| 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 Cancun | 2020/03/08 17:00 | Ryotaro Matsumura v Luis Humberto Lopez | 6-2,4-6,10-8 |
| ITF M15 Changwon | 2019/10/14 04:50 | Jeamoon Lee v Ryotaro Matsumura | 7-5,4-6,10-7 |
| ITF M15 Cancun | 2019/09/11 20:25 | Kalman Boyd v Ryotaro Matsumura | 6-7,6-1,6-1 |
| ITF M15 Cancun | 2019/09/09 15:00 | Sam Ryan Ziegann v Ryotaro Matsumura | 2-6,3-6 |
| 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 |