| ITF M15 Caloundra | 2023/07/30 00:00 | Thomas Nicholas Gadecki v Sam Oster | 4-6,4-6 |
| UTR Pro Carrara | 2023/09/27 23:00 | Ajeet Rai v Sam Oster | 6-1,5-4 |
| UTR Pro Carrara | 2023/09/27 03:30 | Ethan Farlie v Sam Oster | 6-7,2-6 |
| UTR Pro Carrara | 2023/09/26 02:30 | Benjamin O'Connell v Sam Oster | 1-6,3-6 |
| UTR Pro Carrara | 2023/09/24 00:30 | Sam Ryan Ziegann v Sam Oster | 6-4,6-3 |
| ITF M25 Darwin | 2023/09/18 06:30 | Brian Tran v Sam Oster | 6-3,3-6,13-11 |
| ITF M25 Darwin | 2023/09/12 07:40 | Geni Inoue v Sam Oster | 6-3,6-3 |
| ITF M25 Darwin | 2023/09/11 07:30 | William Jesser v Sam Oster | 4-6,2-6 |
| UTR Pro Carrara | 2023/08/19 03:30 | Sam Oster v Tai Leonard Sach | 2-6,4-6 |
| UTR Pro Carrara | 2023/09/26 23:00 | Thomas Nicholas Gadecki v Ethan Cook | 6-3,6-2 |
| UTR Pro Carrara | 2023/09/26 00:30 | Thomas Nicholas Gadecki v Hugo Babakian | 7-6,6-2 |
| UTR Pro Carrara | 2023/09/24 23:00 | Thomas Nicholas Gadecki v Jeremy Beale | 7-5,1-6,3-6 |
| UTR Pro Carrara | 2023/09/23 23:00 | Thomas Nicholas Gadecki v Matthew Scheers | 6-0,7-5 |
| ITF M25 Darwin | 2023/09/19 05:30 | Corban Crowther v Thomas Nicholas Gadecki | 7-6,6-3 |
| ITF M25 Darwin | 2023/09/18 05:30 | Thomas Nicholas Gadecki v Stefan Bianchet | 6-1,7-5 |
| ITF M25 Darwin | 2023/09/12 08:30 | Blake Ellis v Thomas Nicholas Gadecki | 6-0,6-4 |
| ITF M15 Caloundra | 2023/07/30 00:00 | Thomas Nicholas Gadecki v Sam Oster | 4-6,4-6 |