Round: 25 Ground: Hardcourt outdoor
| ITF Japan F3 | 2017/03/19 01:00 | Johns, Collin v Komura, Takuya | 6-2,6-2 |
| ITF Japan F3 | 2017/03/18 06:00 | Johns, Collin v Shimizu, Keigo | 6-4,6-1 |
| ITF Japan F3 | 2017/03/18 00:30 | Johns, Collin v Ono, Yohei | 7-5,6-2 |
| ITF Japan F2 | 2017/03/13 01:00 | Johns, Collin v Sano, Koichi | 5-7,6-4,4-6 |
| ITF Japan F1 | 2017/03/04 01:00 | Johns, Collin v Ono, Yohei | 3-6,6-4,5-7 |
| ITF USA F9 | 2017/02/27 16:00 | Rodriguez-Pace, Ricardo v Johns, Collin | 6-2,7-6 |
| ITF USA F9 | 2017/02/26 16:00 | Trombetta, Ty v Johns, Collin | 6-2,1-6,4-6 |
| ITF USA F9 | 2017/02/25 15:00 | Kiger, Mac v Johns, Collin | 1-6,2-6 |
| Yokohama, Japan, Qualifying | 2017/02/25 04:25 | Watanuki, Yusuke v Evgeny Karlovskiy | 3-6,6-7 |
| Challenger Kyoto Qual | 2017/02/19 02:10 | Watanuki, Yusuke v Gunneswaran, Prajnesh | 2-6,4-6 |
| Challenger Kyoto Qual | 2017/02/18 01:00 | Watanuki, Yusuke v Renta Tokuda | 6-4,4-6,6-1 |
| Launceston, Australia | 2017/02/05 02:10 | Mousley, Bradley v Watanuki, Yusuke | 6-3,6-2 |
| Launceston, Australia | 2017/02/04 03:15 | Casey, Oliver v Watanuki, Yusuke | 5-7,4-6 |
| Challenger - Burnie - Qualifications | 2017/01/28 01:45 | Margaroli, Luca v Watanuki, Yusuke | 7-6,6-2 |
| Challenger Canberra | 2017/01/09 00:55 | Watanuki, Yusuke v Denis Shapovalov | 7-6,4-6,4-6 |
| Challenger Canberra Qual | 2017/01/07 23:00 | Watanuki, Yusuke v Alexander Babanine | 4-6,6-3,6-3 |