| ITF M15 Osijek | 2023/04/30 08:00 | Sam Oster v Jiri Krouzek | 4-6,3-6 |
| ITF M15 Meerbusch | 2023/04/23 08:00 | Sam Oster v Tom Schonenberg | 4-6,1-6 |
| ITF M25 Canberra | 2023/03/19 02:30 | Sam Oster v Zachary Adam-Gedge | 3-6,4-6 |
| ITF M25 Canberra | 2023/03/11 23:00 | Sam Oster v Liam Puttergill | 1-6,6-3,5-10 |
| ITF M25 Swan Hill | 2023/02/28 00:30 | Sam Oster v Cooper Errey | 3-6,6-3,4-10 |
| ITF M25 Swan Hill | 2023/02/20 01:30 | Brian Capalnean v Sam Oster | 6-4,6-4 |
| ITF M25 Burnie | 2023/02/08 06:20 | Thomas Fancutt v Sam Oster | 6-1,6-1 |
| ITF M25 Burnie | 2023/02/05 23:00 | Rhys Searant v Sam Oster | 3-6,3-6 |