| ITF Japan F6 Qual | 2014/06/08 09:00 | Barclay, David v Watanuki, Keisuke | 4-6,2-6 |
| ITF Japan F3 | 2014/03/26 02:50 | Niki, Takuto v Watanuki, Keisuke | 6-3,6-1 |
| ITF Japan F2 | 2014/03/17 03:10 | Watanuki, Keisuke v Shiga, Masato | 6-7,4-6 |
| ITF Japan F6 Qual | 2014/06/07 00:00 | Fukuoka, Yusei v Sano, Koichi | 0-6,2-6 |
| ITF Japan F5 | 2014/06/03 02:30 | Sano, Koichi v Kibi, Yuya | 4-6,2-6 |
| ITF Guam F1 | 2014/05/27 02:45 | Nedunchezhiyan, Jeevan v Sano, Koichi | 6-2,6-4 |