| UTR Pro Tennis Series Carrara | 2021/10/22 23:00 | Alexander Crnokrak v Robert Stirling | 6-0,6-2 |
| UTR Pro Tennis Series Carrara | 2021/10/31 23:00 | Louis Clark v Alexander Crnokrak | 3-6,1-5 |
| UTR Pro Tennis Series Carrara | 2021/10/24 03:00 | Akira Santillan v Alexander Crnokrak | 7-5,5-4 |
| UTR Pro Tennis Series Carrara | 2021/10/23 01:28 | Tai Leonard Sach v Alexander Crnokrak | 7-6,6-7,1-6 |
| UTR Pro Tennis Series Carrara | 2021/10/22 23:00 | Alexander Crnokrak v Robert Stirling | 6-0,6-2 |
| UTR Pro Tennis Series Carrara | 2021/10/22 00:00 | Alexander Crnokrak v Jack Moore | 6-3,5-4 |
| UTR Pro Tennis Series Carrara | 2021/10/20 02:45 | Joshua Ryan v Alexander Crnokrak | 2-6,1-6 |
| UTR Pro Tennis Series Carrara | 2021/10/19 04:30 | Sean Pacey v Alexander Crnokrak | 1-6,0-5 |
| UTR Pro Tennis Series Carrara | 2021/10/17 02:00 | Alexander Crnokrak v Cade Birrell | 6-1,5-1 |
| UTR Pro Tennis Series Carrara | 2021/10/23 02:30 | Sam Ryan Ziegann v Robert Stirling | 7-5,6-3 |
| UTR Pro Tennis Series Carrara | 2021/10/22 23:00 | Alexander Crnokrak v Robert Stirling | 6-0,6-2 |
| UTR Pro Tennis Series Carrara | 2021/10/21 23:30 | Joshua Ryan v Robert Stirling | 6-3,6-7,6-7 |
| UTR Pro Tennis Series Carrara | 2021/10/20 03:30 | Sean Pacey v Robert Stirling | 4-6,4-6 |
| UTR Pro Tennis Series Carrara | 2021/10/18 01:30 | Jack Moore v Robert Stirling | 5-7,1-6 |
| ITF Australia F8 | 2018/10/08 02:30 | Aaron Addison v Robert Stirling | 6-3,7-5 |
| ITF Australia F8 | 2018/10/06 01:00 | Robert Stirling v David Barclay | 6-7,6-4,6-3 |
| ITF Australia F7 | 2018/09/29 01:00 | Dusty H. Boyer v Robert Stirling | 7-6,6-4 |