| UTR Pro Miki | 2023/04/12 00:30 | Taketo Takamisawa v Ryotaro Matsumura | 6-4,2-6,4-6 |
| UTR Pro Miki | 2023/04/11 02:00 | Lemiel Kei Taira v Ryotaro Matsumura | 2-6,0-6 |
| ITF M25 Tsukuba | 2023/03/27 06:00 | Naoki Tajima v Ryotaro Matsumura | 6-3,0-6,10-4 |
| ITF M25 Tsukuba | 2023/03/27 00:30 | Yamato Sueoka v Ryotaro Matsumura | 2-6,6-7 |
| ITF M25 Loule | 2023/03/01 13:30 | Goncalo Oliveira v Ryotaro Matsumura | 6-1,6-2 |
| ITF M25 Loule | 2023/02/28 14:10 | Harry Wendelken v Ryotaro Matsumura | 7-5,3-6,4-10 |
| ITF M25 Loule | 2023/02/27 10:00 | Joao Dinis Silva v Ryotaro Matsumura | 6-7,3-6 |
| ITF M25 Loule | 2023/02/26 10:00 | Adam Blecha v Ryotaro Matsumura | 2-6,4-6 |
| UTR Pro Miki | 2023/04/11 00:30 | Taketo Takamisawa v Graham Maassen | 6-1,6-1 |
| UTR Pro Miki | 2023/04/10 05:30 | Graham Maassen v Kento Tagashira | 6-4,3-6,2-6 |
| ITF M25 Santo Domingo Qual | 2023/02/19 17:55 | Yannik Rahman v Graham Maassen | 6-4,6-1 |
| ITF M25 Santo Domingo | 2023/02/14 13:00 | Justin Roberts v Graham Maassen | 6-1,2-6,11-9 |
| ITF M25 Santo Domingo | 2023/02/13 17:30 | Graham Maassen v Tanguy Genier | 6-3,6-0 |
| ITF M25 Santo Domingo | 2023/02/12 19:00 | Satyajit Simhadri v Graham Maassen | 1-6,3-6 |
| UTR Pro Pozos | 2023/01/21 15:00 | Christian Heaney-Secord v Graham Maassen | 3-6,6-7 |
| UTR Pro Pozos | 2023/01/19 21:01 | Graham Maassen v Manuel S Montemayor | 2-6,3-5 |