Stadium: Centre Round: 28 Ground: Grass
| ITF M25 Albury | 2019/03/02 00:00 | Brydan Klein v Shuichi Sekiguchi | 6-3,6-2 |
| Challenger Yokohama Qual | 2017/02/27 01:00 | Brydan Klein v Shuichi Sekiguchi | 7-5,6-2 |
| ITF M25 Mildura | 2019/03/08 02:40 | Yuta Shimizu v Shuichi Sekiguchi | 3-6,3-6 |
| ITF M25 Mildura | 2019/03/07 02:00 | Issei Okamura v Shuichi Sekiguchi | 3-6,6-3,2-6 |
| ITF M25 Mildura | 2019/03/05 01:30 | Alexis Canter v Shuichi Sekiguchi | 6-7,1-6 |
| ITF M25 Albury | 2019/03/02 00:00 | Brydan Klein v Shuichi Sekiguchi | 6-3,6-2 |
| ITF M25 Albury | 2019/02/28 23:30 | Shuichi Sekiguchi v Thomas Fancutt | 5-7,6-1,6-4 |
| ITF M25 Albury | 2019/02/28 01:20 | Shuichi Sekiguchi v Vincent Stouff | 4-6,6-1,6-2 |
| ITF M25 Albury | 2019/02/26 01:05 | Shuichi Sekiguchi v Alexis Canter | 6-2,6-1 |
| Challenger Da Nang | 2019/01/06 03:00 | Viktor Durasovic v Shuichi Sekiguchi | 6-3,6-2 |
| ITF M25 Mildura | 2019/03/08 02:35 | Christopher O'Connell v Brydan Klein | 6-3,2-6,3-6 |
| ITF M25 Mildura | 2019/03/07 01:50 | Nick Chappell v Brydan Klein | 3-6,2-6 |
| ITF M25 Mildura | 2019/03/06 01:05 | Matthew Romios v Brydan Klein | 3-6,2-6 |
| ITF M25 Albury | 2019/03/03 00:00 | Brydan Klein v Matthew Romios | 6-1,6-2 |
| ITF M25 Albury | 2019/03/02 00:00 | Brydan Klein v Shuichi Sekiguchi | 6-3,6-2 |
| ITF M25 Albury | 2019/03/01 02:10 | Brydan Klein v Harry Bourchier | 7-6,6-3 |
| ITF M25 Albury | 2019/02/28 01:45 | Brydan Klein v Ryota Tanuma | 6-3,6-2 |
| ITF M25 Albury | 2019/02/26 02:45 | Brydan Klein v Matthew Dellavedova | 6-3,6-0 |