Stadium: Court 1 Round: 25 Ground: Clay
| ITF Japan F8 | 2018/06/11 00:30 | Watanuki, Keisuke v 스미자와, 다이스케 | 6-4,2-6,6-2 |
| ITF Japan F3 | 2018/03/17 00:30 | Watanuki, Keisuke v Numajiri, Keisuke | 3-6,1-6 |
| Challenger Kyoto Qual | 2018/02/17 01:00 | Watanuki, Keisuke v Shibano, Kosuke | 4-6,4-6 |
| ITF Japan F8 | 2017/06/15 02:30 | Watanuki, Keisuke v 에하라, 히로야스 | 1-6,3-6 |
| ITF Japan F8 | 2017/06/14 05:50 | Kishi, Ryota v Watanuki, Keisuke | 0-6,1-6 |
| ITF Japan F8 | 2017/06/12 00:00 | Watanuki, Keisuke v 니시와키, 카즈키 | 6-2,6-2 |
| ITF Japan F8 | 2017/06/10 04:00 | Watanuki, Keisuke v 타카미사와, 타케토 | 4-6,6-2,6-3 |
| ITF Japan F7 | 2017/06/08 01:30 | Watanuki, Keisuke v Takeuchi, Kento (1987) | 3-6,5-7 |
| ITF Japan F7 Qual | 2018/06/02 01:00 | Uesugi, Teppei v 타시로, 유가 | 1-6,6-7 |
| ITF Japan F6 Qual | 2018/04/09 01:00 | Uesugi, Teppei v 타케시마, 순로우 | 4-6,2-6 |
| ITF Japan F6 Qual | 2018/04/08 01:00 | 하자와, 신지 v Uesugi, Teppei | 6-4,4-6,6-7 |
| ITF Japan F6 Qual | 2018/04/07 01:00 | Matsuzaki, Yutaro v Uesugi, Teppei | 4-6,0-6 |
| ITF Japan F4 | 2018/03/26 01:00 | 야마사키, 점페이 v Uesugi, Teppei | 6-2,7-5 |
| ITF Japan F4 | 2018/03/25 01:00 | Kato, Takumi v Uesugi, Teppei | 1-6,4-6 |
| ITF Japan F4 | 2018/03/24 00:00 | Uesugi, Teppei v Shirafuji, Naru | 6-2,6-3 |
| ITF Japan F3 | 2018/03/18 01:00 | Uesugi, Teppei v 타마키, 야마오 | 3-6,4-6 |