| UTR Pro Carrara | 2023/08/07 23:00 | Sam Oster v Sam Ryan Ziegann | 6-4,4-6,6-7 |
| UTR Pro Tennis Series Carrara | 2021/10/16 03:30 | Sam Ryan Ziegann v Sam Oster | 6-1,6-1 |
| UTR Pro Tennis Series Brisbane | 2021/07/29 00:30 | Sam Ryan Ziegann v Sam Oster | 1-3 |
| UTR Pro Carrara | 2023/08/14 02:00 | Sam Ryan Ziegann v Jayden Lewindon | 6-1,5-2 |
| UTR Pro Carrara | 2023/08/12 04:00 | Sam Ryan Ziegann v Jayden Court | 3-6,4-6 |
| UTR Pro Carrara | 2023/08/10 23:00 | Sam Ryan Ziegann v Jeremy Beale | 2-6,4-6 |
| UTR Pro Carrara | 2023/08/10 02:00 | Sam Ryan Ziegann v Tomislav E Papac | 6-4,3-6,2-6 |
| UTR Pro Carrara | 2023/08/09 06:00 | Thomas Hann v Sam Ryan Ziegann | 4-6,3-6 |
| UTR Pro Carrara | 2023/08/07 23:00 | Sam Oster v Sam Ryan Ziegann | 6-4,4-6,6-7 |
| ITF M15 Caloundra | 2023/08/01 01:30 | Arjun Mehrotra v Sam Ryan Ziegann | 6-2,6-3 |
| ITF M15 Caloundra | 2023/07/31 00:00 | William Jesser v Sam Ryan Ziegann | 0-6,6-7 |
| UTR Pro Carrara | 2023/08/14 02:00 | Sam Oster v Alexey Shtengelov | 7-5,6-0 |
| UTR Pro Carrara | 2023/08/10 23:00 | Sam Oster v Tomislav E Papac | 4-6,4-6 |
| UTR Pro Carrara | 2023/08/09 06:00 | Sam Oster v Jeremy Beale | 0-6,1-6 |
| UTR Pro Carrara | 2023/08/07 23:00 | Sam Oster v Sam Ryan Ziegann | 6-4,4-6,6-7 |
| UTR Pro Carrara | 2023/08/07 00:30 | Thomas Hann v Sam Oster | 6-0,7-5 |
| ITF M15 Caloundra | 2023/08/02 03:20 | Tai Leonard Sach v Sam Oster | 6-1,6-3 |
| ITF M15 Caloundra | 2023/08/01 01:45 | James Watt v Sam Oster | 6-7,6-2,7-10 |
| ITF M15 Caloundra | 2023/07/31 00:00 | Sam Oster v Seungmin Park | 6-2,6-2 |