Stadium: Court 8 Round: 62 Ground: Clay
| ITF Australia F4 Qual | 2018/03/25 00:30 | Zac Osborne v Marlino Pascual | 6-3,6-4 |
| ITF Australia F4 Qual | 2018/03/24 03:30 | Yasutaka Suzuki v Zac Osborne | 3-6,6-3,3-6 |
| ITF Australia F3 Qual | 2018/03/19 00:00 | Yu Hsiou Hsu v Zac Osborne | 6-4,6-1 |
| ITF Australia F3 Qual | 2018/03/18 00:30 | Arjun Mehrotra v Zac Osborne | 3-6,6-4,2-6 |
| ITF Australia F3 Qual | 2018/03/16 23:00 | Zac Osborne v Mason Naumovski | 6-3,6-3 |
| ITF Australia F2 Qual | 2018/03/02 23:00 | Brian Tran v Zac Osborne | 6-4,6-2 |
| ITF Australia F1 Qual | 2018/02/23 23:00 | Moerani Bouzige v Zac Osborne | 6-7,7-6,7-5 |
| ITF Australia F6 | 2017/09/30 01:30 | Zac Osborne v Michael Shepheard | 1-6,4-6 |
| ITF Australia F4 Qual | 2018/03/24 03:30 | Ryan Laubser v Jackson B-Tennant | 4-6,4-6 |