Round: 25 Ground: Hardcourt indoor
| Challenger Nanchang | 2016/09/12 02:00 | Tatsuma Ito v Shuichi Sekiguchi | 6-3,1-6,7-6 |
| ATP Memphis Qual | 2017/02/12 00:30 | James McGee v Tatsuma Ito | 6-4,6-7,1-6 |
| Challenger San Francisco | 2017/02/10 22:00 | Tatsuma Ito v Ze Zhang | 2-6,3-6 |
| Challenger San Francisco | 2017/02/09 23:30 | Peter Polansky v Tatsuma Ito | 6-7,6-3,4-6 |
| Challenger San Francisco | 2017/02/08 22:00 | Tatsuma Ito v Darian King | 7-6,6-2 |
| Challenger Dallas | 2017/02/03 20:20 | Ryan Harrison v Tatsuma Ito | 6-3,6-0 |
| Challenger Dallas | 2017/02/02 21:25 | Tatsuma Ito v Elias Ymer | 6-4,6-4 |
| Challenger Dallas | 2017/02/01 18:30 | Mikhail Kukushkin v Tatsuma Ito | 6-4,6-7,6-7 |
| Challenger Dallas | 2017/01/31 19:15 | Tatsuma Ito v Alejandro Gomez | 6-4,6-4 |
| Challenger Kyoto Qual | 2017/02/20 01:30 | Shuichi Sekiguchi v Evgeny Karlovskiy | 5-7,0-6 |
| Challenger Kyoto Qual | 2017/02/19 01:00 | Shuichi Sekiguchi v Yunosuke Tanaka | 6-0,6-4 |
| Challenger Kyoto Qual | 2017/02/18 03:00 | Shuichi Sekiguchi v Shinta Fujii | 6-1,7-5 |
| Challenger Bangkok 2 | 2017/01/12 06:00 | Daniel Altmaier v Shuichi Sekiguchi | 6-4,6-1 |
| Challenger Bangkok 2 | 2017/01/11 03:00 | Shuichi Sekiguchi v Yannick Mertens | 6-3,3-6,6-1 |
| Challenger Bangkok 2 | 2017/01/09 08:20 | Shuichi Sekiguchi v Phassawit Bura'ritta | 6-1,6-4 |
| ITF Hong Kong F1 | 2017/01/03 03:15 | Shuichi Sekiguchi v Li-Wei Tan | 6-4,6-2 |
| ITF Hong Kong F5 | 2016/12/30 23:00 | Shuichi Sekiguchi v Sora Fukuda | 6-0,6-7,6-7 |