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 Kamchai, Thammarat | 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 Kaewsuto, Chayanon | 6-3,4-6,7-6 |
| ITF Thailand F2 | 2018/08/25 04:00 | Krittin Koaykul v Srirat, Tanakorn | 6-1,6-2 |
| ITF Thailand F1 | 2018/08/18 03:30 | Khunjan, Nawakarn v Krittin Koaykul | 7-5,7-6 |
| ITF Thailand F3 | 2018/09/02 02:00 | Kumthonkittikul, W. v Wattanakul, Pol | 1-6,2-6 |
| ITF Thailand F2 | 2018/08/28 07:10 | Saito, Takashi v Wattanakul, Pol | 6-3,3-6,6-3 |
| ITF Thailand F2 | 2018/08/27 02:45 | Kawakami, Rimpei v Wattanakul, Pol | 4-6,2-6 |
| ITF Thailand F1 | 2018/08/21 08:40 | Wattanakul, Pol v Thanapet Chanta | 4-6,4-6 |
| ITF Thailand F1 | 2018/08/20 03:50 | Wattanakul, Pol v Roberts, Charles | 6-3,6-1 |
| ITF Thailand F1 | 2018/08/19 04:45 | Wattanakul, Pol v Yuttana Charoenphon | 6-4,3-6,6-3 |
| ITF USA F8 Qual | 2018/03/17 22:30 | Ram-Harel, Or v Wattanakul, Pol | 6-1,6-2 |
| Bangkok, Thaïlande | 2018/01/09 06:30 | Granollers, Marcel v Wattanakul, Pol | 6-2,6-0 |