Round: 62 Ground: Clay
| ITF Australia F3 Qual | 2018/03/18 00:30 | Lewis Miles v David Barclay | 6-4,6-4 |
| ITF Australia F3 Qual | 2018/03/17 01:30 | David Barclay v Socrates Leon Tsoronis | 7-5,6-4 |
| ITF Australia F2 Qual | 2018/03/03 00:00 | Michael Commings v David Barclay | 3-6,6-2,6-4 |
| ITF Australia F1 Qual | 2018/02/25 23:00 | Kody Pearson v David Barclay | 1-6,6-4,6-4 |
| ITF Australia F1 Qual | 2018/02/24 00:00 | David Barclay v Jayden Court | 6-7,7-5,6-3 |
| Challenger Canberra Qual | 2018/01/06 00:15 | David Barclay v Jaimee Floyd Angele | 5-7,6-4,5-7 |
| Challenger Canberra 2 Qual | 2017/10/28 00:20 | Dane Propoggia v David Barclay | 6-2,6-4 |
| ITF Australia F7 Qual | 2017/10/07 01:00 | Mayez Jupiter Elrich v David Barclay | 2-6,6-4,6-4 |