Stadium: Court 11 Round: 25 Ground: Hardcourt outdoor
| Challenger Kobe | 2018/11/13 07:50 | Samper-Montana, Jordi v Sekiguchi, Shuichi | 6-4,6-1 |
| ITF Vietnam F4 | 2018/10/25 03:00 | Sekiguchi, Shuichi v Bergevi, Filip | 3-6,4-6 |
| ITF Vietnam F4 | 2018/10/23 05:20 | Sekiguchi, Shuichi v Billy Harris | 7-6,4-6,7-6 |
| ITF Slovakia F3 | 2018/08/07 11:25 | Butler, Samm v Sekiguchi, Shuichi | 6-1,7-6 |
| ITF Austria F3 | 2018/07/16 08:00 | Panta Herreros, Jorge Brian v Sekiguchi, Shuichi | 1-6,7-6,7-5 |
| ITF Czech Republic F6 | 2018/07/10 08:00 | Bugaj, Martin v Sekiguchi, Shuichi | 6-1,6-2 |
| ITF China F9 | 2018/07/06 03:00 | Song, Min-Kyu v Sekiguchi, Shuichi | 6-2,6-1 |
| ITF China F9 | 2018/07/05 04:35 | Li, Chenhe v Sekiguchi, Shuichi | 2-6,5-7 |
| ITF Portugal F22 | 2018/10/24 12:40 | Boluda-Purkiss, Carlos v Johannson-Holm, Jakob | 2-6,7-5,3-6 |
| ITF Spain F31 | 2018/10/11 11:05 | Boluda-Purkiss, Carlos v Salman, Omar | 2-6,2-6 |
| ITF Spain F31 | 2018/10/10 10:30 | Boluda-Purkiss, Carlos v Sergi Perez Contri | 6-1,6-0 |
| ITF Spain F29 | 2018/09/25 12:00 | Esteve Lobato, Eduard v Boluda-Purkiss, Carlos | 6-2,6-7,6-3 |
| ITF Spain F27 | 2018/09/15 18:00 | Boluda-Purkiss, Carlos v Salman, Omar | 6-1,6-1 |
| ITF Spain F27 | 2018/09/12 10:00 | Boluda-Purkiss, Carlos v Feitt, Franco | 6-2,6-1 |
| ITF Spain F27 | 2018/09/11 18:30 | Boluda-Purkiss, Carlos v Benjamin Winter Lopez | 6-0,6-2 |
| ITF Spain F24 | 2018/08/23 10:00 | Ivan Gakhov v Boluda-Purkiss, Carlos | 6-4,1-6,6-3 |