| ITF Thailand F2 | 2018/08/25 04:00 | Tsung-Hao Huang v Worarin Kumthonkittikul | 6-3,7-6 |
| ITF Thailand F1 | 2018/08/20 02:00 | Phongsapak Kerdlaphee v Worarin Kumthonkittikul | 6-2,6-3 |
| ITF Thailand F1 | 2018/08/19 05:00 | Worarin Kumthonkittikul v Gregory Nitayamekin | 6-1,6-0 |
| ITF Thailand F1 | 2018/08/18 04:20 | Nitiwat Jityaem v Worarin Kumthonkittikul | 1-6,1-6 |
| ITF Korea F4 | 2018/08/12 02:00 | Jeong Heon Lee v Worarin Kumthonkittikul | 6-2,6-3 |
| ITF Korea F4 | 2018/08/11 01:00 | Sang Yeop Kim v Worarin Kumthonkittikul | 0-6,3-6 |
| ITF Indonesia F3 Qual | 2018/08/04 07:00 | Worarin Kumthonkittikul v Siddharth Vishwakarma | 3-6,3-6 |
| ITF Guam F1 | 2018/06/17 00:00 | Yasunori Hashikawa v Worarin Kumthonkittikul | 1-6,5-7 |
| ITF Thailand F2 | 2018/08/28 07:10 | Takashi Saito v Pol Wattanakul | 6-3,3-6,6-3 |
| ITF Thailand F2 | 2018/08/27 02:45 | Rimpei Kawakami v Pol Wattanakul | 4-6,2-6 |
| ITF Thailand F1 | 2018/08/21 08:40 | Pol Wattanakul v Thanapet Chanta | 4-6,4-6 |
| ITF Thailand F1 | 2018/08/20 03:50 | Pol Wattanakul v Charles Roberts | 6-3,6-1 |
| ITF Thailand F1 | 2018/08/19 04:45 | Pol Wattanakul v Yuttana Charoenphon | 6-4,3-6,6-3 |
| ITF USA F8 Qual | 2018/03/17 22:30 | Or Ram-Harel v Pol Wattanakul | 6-1,6-2 |
| Challenger Bangkok | 2018/01/09 06:30 | Marcel Granollers v Pol Wattanakul | 6-2,6-0 |
| ITF Thailand F11 | 2017/12/04 07:10 | Pol Wattanakul v Cheong-Eui Kim | 2-6,6-7 |