Stadium: Court 2 Round: 44
| 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 Tunisia F21 | 2018/05/30 11:35 | Vasil Kirkov v Worarin Kumthonkittikul | 5-7,7-6,6-1 |
| ITF Tunisia F21 | 2018/05/27 09:00 | Philip Sikman v Worarin Kumthonkittikul | 2-6,2-6 |
| ITF Tunisia F21 | 2018/05/26 10:00 | Robert Hughes v Worarin Kumthonkittikul | 1-6,4-6 |
| ITF Tunisia F20 | 2018/05/22 11:00 | Constantin Bittoun Kouzmine v Worarin Kumthonkittikul | 6-2,6-2 |