Round: 62 Ground: Hardcourt outdoor
| ITF Australia F7 | 2016/10/01 03:00 | Robert Stirling v Arjun Mehrotra | 3-6,3-6 |
| ITF Japan F6 Qual | 2018/04/08 01:00 | Takuya Kumasaka v David Barclay | 5-7,6-3,6-1 |
| ITF Japan F6 Qual | 2018/04/07 01:00 | David Barclay v Yuichiro Inui | 1-6,7-6,6-4 |
| ITF Australia F4 Qual | 2018/03/26 01:10 | Aaron Addison v David Barclay | 7-5,6-4 |
| ITF Australia F4 Qual | 2018/03/25 00:30 | Brian Tran v David Barclay | 4-6,5-7 |
| ITF Australia F4 Qual | 2018/03/24 03:30 | David Barclay v Stefan Storch | 6-2,6-0 |
| 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 |