| ITF Japan F7 | 2015/06/16 00:30 | Ko Suzuki v Yusuke Watanuki | 0-6,2-6 |
| ITF Japan F7 | 2015/06/16 00:30 | Ko Suzuki v Yusuke Watanuki | 0-6,2-6 |
| ITF Japan F6 | 2015/06/11 01:00 | Ko Suzuki v Kento Takeuchi | 6-7,3-6 |
| ITF Japan F6 Qual | 2015/06/07 01:00 | Ko Suzuki v Kento Tanaka-Tamaki | 6-2,6-3 |
| ITF Guam F1 | 2015/05/30 04:20 | Gengo Kikuchi v Ko Suzuki | 6-2,6-3 |
| ITF Guam F1 | 2015/05/29 05:10 | Ko Suzuki v Sho Katayama | 6-3,4-6,6-2 |
| ITF Guam F1 | 2015/05/28 00:00 | Koichi Sano v Ko Suzuki | 2-6,1-6 |
| ITF Japan F3 | 2015/03/23 01:00 | Ko Suzuki v Jeamoon Lee | 3-6,0-6 |
| ITF Japan F3 | 2015/03/21 04:00 | Ko Suzuki v Ryotaro Matsumura | 6-0,6-1 |
| ITF Japan F7 | 2015/06/21 02:00 | Hiroyasu Ehara v Yusuke Watanuki | 7-5,4-6,2-6 |
| ITF Japan F7 | 2015/06/20 01:00 | Yusuke Watanuki v Ju-Hae Moon | 6-2,7-6 |
| ITF Japan F7 | 2015/06/19 03:00 | Hiromasa Oku v Yusuke Watanuki | 2-6,3-6 |
| ITF Japan F7 | 2015/06/18 00:30 | Tetsuro Habusawa v Yusuke Watanuki | 4-6,2-6 |
| ITF Japan F7 | 2015/06/16 00:30 | Ko Suzuki v Yusuke Watanuki | 0-6,2-6 |
| ITF Japan F6 | 2015/06/11 01:00 | Yusuke Watanuki v Takashi Saito | 6-3,6-7,3-6 |
| ITF Japan F6 | 2015/06/09 04:00 | Yusuke Watanuki v Renta Tokuda | 7-5,2-6,6-2 |
| ITF Japan F4 | 2015/04/02 01:00 | Hiroyasu Ehara v Yusuke Watanuki | 6-3,2-6,6-2 |