| ITF Serbia F6 | 2015/07/11 11:00 | David Barclay v Olexiy Kolisnyk | 6-7,7-6,2-6 |
| ITF Serbia F6 | 2015/07/06 08:00 | David Barclay v Strahinja Rakic | 3-6,1-6 |
| ITF Serbia F6 | 2015/07/04 07:00 | Alexander Boborykin v David Barclay | 6-2,5-7,2-6 |
| ITF Japan F8 | 2015/06/21 00:00 | Koichi Sano v David Barclay | 3-6,6-3,6-4 |
| ITF Japan F7 | 2015/06/16 01:45 | Ju-Hae Moon v David Barclay | 6-2,6-2 |
| ITF Japan F7 Qual | 2015/06/15 00:30 | Taiki Hashimoto v David Barclay | 7-5,4-6,3-6 |
| ITF Japan F7 Qual | 2015/06/13 00:00 | David Barclay v Yusei Fukuoka | 6-1,6-0 |
| ITF Japan F5 | 2015/05/31 01:00 | Yuichiro Inui v David Barclay | 6-3,3-6,6-1 |
| ITF Serbia F6 | 2015/07/11 11:00 | Keisuke Numajiri v Goran Markovic | 6-4,6-4 |
| ITF Japan F8 | 2015/06/25 01:00 | Keisuke Numajiri v Keisuke Watanuki | 3-6,3-6 |
| ITF Japan F7 Qual | 2015/06/15 00:30 | Renta Tokuda v Keisuke Numajiri | 3-6,1-6 |
| ITF Japan F7 Qual | 2015/06/13 00:00 | Naoto Kai v Keisuke Numajiri | 2-6,3-6 |
| ITF Japan F6 Qual | 2015/06/07 05:00 | Koichi Sano v Keisuke Numajiri | 6-0,4-6,6-1 |
| ITF USA F16 | 2015/05/09 16:00 | Justin Lunn v Keisuke Numajiri | 3-6,2-6 |
| ITF USA F16 | 2015/05/08 20:00 | Brandon Donaldson v Keisuke Numajiri | 1-6,2-6 |
| ITF USA F14 | 2015/04/29 15:30 | Keisuke Numajiri v Facundo Mena | 6-7,3-6 |