Stadium: Court 8 Round: 44 Ground: Hardcourt outdoor
| ITF China F9 Qual | 2018/06/30 02:00 | David Barclay v Jiaqi Duan | 6-1,6-4 |
| ITF Guam F1 | 2018/06/21 00:00 | Yuichi Ito v David Barclay | 6-2,6-2 |
| ITF Guam F1 | 2018/06/20 00:00 | Keisuke Numajiri v David Barclay | 6-1,2-6,2-6 |
| ITF Japan F8 | 2018/06/09 01:00 | Yutaro Matsuzaki v David Barclay | 1-6,6-4,6-3 |
| ITF Japan F7 Qual | 2018/06/03 01:00 | Kazuki Shimizu v David Barclay | 6-0,6-4 |
| 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 Japan F8 | 2018/06/13 02:25 | Takashi Saito v Kousuke Ogura | 6-2,4-6,6-1 |
| ITF Japan F8 | 2018/06/11 00:30 | Kousuke Ogura v Keisuke Numajiri | 6-2,6-1 |
| ITF Japan F8 | 2018/06/09 06:10 | Ryota Kishi v Kousuke Ogura | 1-6,2-6 |
| ITF Japan F8 | 2018/06/09 01:00 | Takahiro Kubo v Kousuke Ogura | 0-6,3-6 |
| ITF Japan F7 Qual | 2018/06/03 01:00 | Arata Onozawa v Kousuke Ogura | 6-2,6-1 |
| ITF China F5 Qual | 2018/05/05 09:50 | Olly Sadler v Kousuke Ogura | 6-3,3-6,6-2 |
| ITF China F4 Qual | 2018/04/29 03:05 | Liran Chen v Kousuke Ogura | 7-5,6-2 |
| ITF China F4 Qual | 2018/04/28 03:40 | Kousuke Ogura v Ruitong Fang | 6-0,6-2 |