Stadium: Court B Round: 26
| ITF Thailand F5 | 2018/10/03 03:40 | Takashi Saito v Jirat Navasirisomboon | 7-5,6-1 |
| ITF Thailand F8 | 2018/11/06 05:00 | Jung-Woong Na v Jirat Navasirisomboon | 6-2,3-6,1-6 |
| ITF Thailand F7 | 2018/10/29 05:35 | Mikhail Fufygin v Jirat Navasirisomboon | 6-4,6-7,6-1 |
| ITF Thailand F6 | 2018/10/10 03:00 | Jirat Navasirisomboon v Kento Takeuchi | 3-6,4-6 |
| ITF Thailand F6 | 2018/10/09 02:30 | Akanit Pumjit v Jirat Navasirisomboon | 3-6,7-6,2-6 |
| ITF Thailand F5 | 2018/10/03 03:40 | Takashi Saito v Jirat Navasirisomboon | 7-5,6-1 |
| ITF Thailand F5 | 2018/10/02 03:00 | Maciej Smola v Jirat Navasirisomboon | 3-6,5-7 |
| ITF Thailand F4 | 2018/09/25 05:45 | Sidharth Rawat v Jirat Navasirisomboon | 4-6,6-2,6-3 |
| ITF Thailand F3 | 2018/09/05 02:00 | Jirat Navasirisomboon v Karunuday Singh | 3-6,4-6 |
| ITF Thailand F8 | 2018/11/05 08:55 | Pruchya Isarow v Takashi Saito | 3-6,4-6 |
| ITF Thailand F6 | 2018/10/11 03:00 | Takashi Saito v Matic Spec | 4-6,7-6,6-7 |
| ITF Thailand F6 | 2018/10/09 05:00 | Takashi Saito v David Agung Susanto | 6-2,6-1 |
| ITF Thailand F5 | 2018/10/04 04:30 | Takashi Saito v Kelsey Stevenson | 4-6,6-7 |
| ITF Thailand F5 | 2018/10/03 03:40 | Takashi Saito v Jirat Navasirisomboon | 7-5,6-1 |
| ITF Thailand F5 | 2018/10/01 04:00 | Takashi Saito v Congsup Congcar | 7-6,1-6,6-4 |
| Challenger Kaohsiung | 2018/09/15 07:45 | Takashi Saito v Yan Bai | 3-6,3-6 |
| ITF Thailand F3 | 2018/09/06 02:00 | Soichiro Moritani v Takashi Saito | 7-5,6-2 |