Estadio: Court 4 Round: 26 Ground: Hardcourt outdoor
| ITF M15 Wuhan | 2019/05/01 05:50 | Shuichi Sekiguchi v Chenhe Li | 6-4,6-3 |
| ITF M25 Matsuyama | 2019/04/14 04:15 | Takuto Niki v Shuichi Sekiguchi | 4-6,4-6 |
| ITF M25 Matsuyama | 2019/04/13 01:00 | Seong Chan Hong v Shuichi Sekiguchi | 2-6,3-6 |
| ITF M25 Matsuyama | 2019/04/12 05:20 | Naoki Tajima v Shuichi Sekiguchi | 4-6,4-6 |
| ITF M25 Matsuyama | 2019/04/12 02:25 | Issei Okamura v Shuichi Sekiguchi | 1-6,0-6 |
| ITF M25 Matsuyama | 2019/04/09 04:10 | Ryota Tanuma v Shuichi Sekiguchi | 4-6,4-6 |
| ITF M15 Kashiwa | 2019/04/03 05:20 | Takuto Niki v Shuichi Sekiguchi | 2-6,6-3,7-6 |
| ITF M15 Nishi-Tokyo | 2019/03/17 02:00 | Shuichi Sekiguchi v Seong Chan Hong | 6-7,4-6 |
| ITF M15 Wuhan | 2019/05/01 02:00 | Alexander Crnokrak v Sheng Hao Zhou | 6-4,6-4 |
| ITF M15 Wuhan | 2019/04/30 04:05 | Alexander Crnokrak v Tao Mu | 6-1,6-4 |
| ITF M15 Wuhan | 2019/04/29 06:25 | Alexander Crnokrak v Yong Jia Cai | 6-2,6-0 |
| ITF M15 Mornington | 2019/03/26 01:20 | Alexander Crnokrak v Harry Bourchier | 4-6,5-7 |
| ITF M25 Albury | 2019/02/27 23:30 | Issei Okamura v Alexander Crnokrak | 3-6,2-6 |
| ITF M25 Albury | 2019/02/27 02:50 | Alexander Crnokrak v James Frawley | 6-3,6-1 |
| ITF 15 Antalya | 2019/02/11 07:00 | Alexander Crnokrak v Florent Diep | 0-6,0-6 |
| ITF 15 Antalya | 2019/02/05 10:35 | Bruno Santanna v Alexander Crnokrak | 6-2,4-6,6-2 |