Stadium: Court 1 Round: 44
| ITF Thailand F3 | 2018/09/02 02:00 | Sam Ryan Ziegann v Krittin Koaykul | 6-7,1-6 |
| ITF Thailand F3 | 2018/09/01 05:00 | Krittin Koaykul v Thammarat Kamchai | 6-2,6-1 |
| ITF Thailand F2 | 2018/08/28 02:00 | Krittin Koaykul v Thomas Fancutt | 1-6,6-7 |
| ITF Thailand F2 | 2018/08/27 02:45 | Yuttana Charoenphon v Krittin Koaykul | 6-4,3-6,0-6 |
| ITF Thailand F2 | 2018/08/26 03:30 | Krittin Koaykul v Chayanon Kaewsuto | 6-3,4-6,7-6 |
| ITF Thailand F2 | 2018/08/25 04:00 | Krittin Koaykul v Tanakorn Srirat | 6-1,6-2 |
| ITF Thailand F1 | 2018/08/18 03:30 | Nawakarn Khunjan v Krittin Koaykul | 7-5,7-6 |
| ITF Thailand F3 | 2018/09/02 02:00 | Worarin Kumthonkittikul v Pol Wattanakul | 1-6,2-6 |
| 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 |