| UTR Pro Carrara | 2023/08/15 00:30 | Sam Ryan Ziegann v Sam Oster | 6-1,7-5 |
| 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 |
| ITF M25 Darwin | 2023/09/20 06:45 | Ajeet Rai v Sam Ryan Ziegann | 6-3,6-1 |
| ITF M25 Darwin | 2023/09/19 05:30 | Sam Ryan Ziegann v Cooper Wilkinson | 6-4,6-2 |
| ITF M25 Darwin | 2023/09/12 09:25 | Jake Delaney v Sam Ryan Ziegann | 6-2,6-3 |
| UTR Pro Carrara | 2023/08/19 02:00 | Jeremy Beale v Sam Ryan Ziegann | 7-6,6-3 |
| UTR Pro Carrara | 2023/08/17 04:30 | Sam Ryan Ziegann v William Jesser | 6-0,6-2 |
| UTR Pro Carrara | 2023/08/16 01:06 | Sam Ryan Ziegann v Zachary Viiala | 7-5,5-7,6-2 |
| UTR Pro Carrara | 2023/08/15 00:30 | Sam Ryan Ziegann v Sam Oster | 6-1,7-5 |
| UTR Pro Carrara | 2023/08/14 02:00 | Sam Ryan Ziegann v Jayden Lewindon | 6-1,5-2 |
| 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 | 2023/08/18 03:30 | Jayden Lewindon v Sam Oster | 1-6,1-6 |
| UTR Pro Carrara | 2023/08/15 00:30 | Sam Ryan Ziegann v Sam Oster | 6-1,7-5 |
| 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 |