Stadium: Court 4 Round: 25 Ground: Hardcourt outdoor
| Challenger Kaohsiung | 2018/09/15 07:45 | Saito, Takashi v Yan Bai | 3-6,3-6 |
| ITF Thailand F3 | 2018/09/06 02:00 | Moritani, Soichiro v Saito, Takashi | 7-5,6-2 |
| ITF Thailand F3 | 2018/09/05 04:00 | Ito, Yuichi v Saito, Takashi | 2-6,6-4,3-6 |
| ITF Thailand F3 | 2018/09/04 06:55 | Kovapitukted, Palaphoom v Saito, Takashi | 6-4,4-6,2-6 |
| ITF Thailand F2 | 2018/08/29 04:00 | Saito, Takashi v Farren, Connor | 6-2,6-1 |
| ITF Thailand F2 | 2018/08/28 07:10 | Saito, Takashi v Wattanakul, Pol | 6-3,3-6,6-3 |
| Meerbusch, Allemagne, Qualifications | 2018/08/12 14:25 | Saito, Takashi v Alexandre Muller | 3-6,0-6 |
| ITF Belgium F7 | 2018/08/09 09:20 | Saito, Takashi v Benjamin Pietri | 6-7,4-6 |
| ITF Thailand F4 | 2018/09/26 04:55 | Congsup Congcar v Shintaro Imai | 4-6,3-6 |
| ITF Thailand F4 | 2018/09/24 04:00 | Noikor, Noppadol v Congsup Congcar | 2-6,3-6 |
| ITF Thailand F3 | 2018/09/05 03:50 | Isarow, Pruchya v Congsup Congcar | 6-3,6-7,6-1 |
| ITF Thailand F3 | 2018/09/03 03:00 | Congsup Congcar v Kazuma Kawachi | 7-6,6-4 |
| ITF Thailand F2 | 2018/08/27 08:10 | Congsup Congcar v El Midhawy, Adam | 4-6,6-2,4-6 |
| ITF Thailand F1 | 2018/08/21 02:00 | Brugnerotto, Marco v Congsup Congcar | 6-4,7-5 |
| ITF Indonesia F3 | 2018/08/07 02:50 | Congsup Congcar v Sho Shimabukuro | 6-4,2-6,4-6 |
| ITF Indonesia F2 Qual | 2018/07/31 02:00 | Congsup Congcar v Susanto, David Agung | 4-6,4-6 |