Stadium: Court 2 Round: 64 Ground: Hardcourt outdoor
| Chengdu, China | 2019/08/02 09:15 | Sekiguchi, Shuichi v Tatsuma Ito | 2-6,1-6 |
| Kyoto, Japan | 2017/02/21 01:30 | Tatsuma Ito v Sekiguchi, Shuichi | 6-2,6-3 |
| Nanchang, China | 2016/09/12 02:00 | Tatsuma Ito v Sekiguchi, Shuichi | 6-3,1-6,7-6 |
| Te Anau, Simples M-ITF-NZL-01A | 2020/01/04 00:30 | Luke Saville v Sekiguchi, Shuichi | 6-3,6-3 |
| Te Anau, Simples M-ITF-NZL-01A | 2020/01/02 21:00 | Stoupe, George v Sekiguchi, Shuichi | 3-6,1-6 |
| Te Anau, Simples M-ITF-NZL-01A | 2020/01/01 22:00 | Calum Puttergill v Sekiguchi, Shuichi | 6-2,2-6,2-6 |
| Te Anau, Simples M-ITF-NZL-01A | 2019/12/31 05:15 | Sam Ryan Ziegann v Sekiguchi, Shuichi | 2-6,3-6 |
| Challenger - Pune | 2019/11/14 06:30 | Sekiguchi, Shuichi v Ortega-Olmedo, Roberto | 2-6,4-6 |
| Challenger - Pune | 2019/11/12 07:45 | Sekiguchi, Shuichi v Blokhin, Roman | 6-3,6-0 |
| Challenger Kobe | 2019/11/04 02:40 | Patael, Ben v Sekiguchi, Shuichi | 6-3,6-2 |
| Playford City II, Australie | 2019/10/31 02:55 | Marc Polmans v Sekiguchi, Shuichi | 6-3,6-4 |
| Open d'Australie Playoff Wilcard Australienne | 2019/12/08 06:00 | Jason Jung v Tatsuma Ito | 5-7,4-6 |
| Open d'Australie Playoff Wilcard Australienne | 2019/12/07 05:30 | Yunseong Chung v Tatsuma Ito | 6-1,4-6,4-6 |
| Open d'Australie Playoff Wilcard Australienne | 2019/12/06 03:55 | Nam, Ji Sung v Tatsuma Ito | 6-3,1-6,1-6 |
| Open d'Australie Playoff Wilcard Australienne | 2019/12/04 03:35 | Jumpei Yamasaki v Tatsuma Ito | 2-6,2-6 |
| Playford City II, Australie | 2019/11/01 01:50 | Alex Bolt v Tatsuma Ito | 5-7,4-6 |
| Playford City II, Australie | 2019/10/31 03:30 | Blake Mott v Tatsuma Ito | 4-6,6-7 |
| Playford City II, Australie | 2019/10/30 01:20 | Klein, Brydan v Tatsuma Ito | 4-6,4-6 |
| Challenger Traralgon | 2019/10/26 06:15 | Harris, Andrew v Tatsuma Ito | 4-6,7-6,7-6 |