Stadium: Court 1 Round: 27 Ground: Hardcourt outdoor
| 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 Belgium F7 | 2018/08/07 16:35 | Saito, Takashi v Vadym Ursu | 6-7,6-3,7-6 |
| ITF Germany F10 | 2018/07/31 10:00 | Manuel Guinard v Saito, Takashi | 7-6,0-6,6-1 |
| Challenger Tampere | 2018/07/21 11:05 | Ivan Gakhov v Saito, Takashi | 6-1,6-3 |
| Challenger Scheveningen Qual | 2018/07/14 10:00 | Saito, Takashi v Alejandro Davidovich Fokina | 3-6,2-6 |
| ITF Thailand F2 | 2018/08/29 02:00 | Thanapet Chanta v Rikl, Patrik | 3-6,1-6 |
| ITF Thailand F2 | 2018/08/28 05:10 | Kazuma Kawachi v Rikl, Patrik | 1-6,0-6 |
| ITF Thailand F1 | 2018/08/24 03:00 | Rikl, Patrik v Kelly, Dayne | 3-6,4-6 |
| ITF Thailand F1 | 2018/08/23 05:05 | Navasirisomboon, Jirat v Rikl, Patrik | 1-6,2-6 |
| ITF Thailand F1 | 2018/08/22 04:50 | Khunjan, Nawakarn v Rikl, Patrik | 2-6,2-6 |
| ITF Thailand F1 | 2018/08/20 05:00 | Borisutpong, Pattanapong v Rikl, Patrik | 2-6,2-6 |
| Challenger Liberec | 2018/07/31 09:30 | Benjamin Bonzi v Rikl, Patrik | 2-6,6-2,6-1 |
| Challenger - Prague | 2018/07/25 13:55 | Moraing, Mats v Rikl, Patrik | 4-6,6-3,6-2 |