Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Chiang Rai Qual | 2022/06/19 03:00 | Natthayut Nithithananont v Krittin Koaykul | 2-6,6-7 |
| ITF M15 Nakhon Si Thammarat Qual | 2024/02/25 06:30 | Leo Vithoontien v Krittin Koaykul | 6-2,6-7,11-9 |
| ITF M15 Nakhon Si Thammarat Qual | 2024/02/18 03:50 | Leo Vithoontien v Krittin Koaykul | 6-4,6-4 |
| ITF M15 Nakhon Si Thammarat | 2024/02/14 04:45 | Orel Kimhi v Krittin Koaykul | 6-4,6-0 |
| ITF M15 Nakhon Si Thammarat | 2024/02/12 04:45 | Jumpei Yamasaki v Krittin Koaykul | 4-6,3-6 |
| ITF M15 Nakhon Si Thammarat | 2024/02/11 04:00 | Pannawat Suttisomboon v Krittin Koaykul | 4-6,3-6 |
| ITF M25 Hua Hin | 2023/11/15 02:50 | Koki Matsuda v Krittin Koaykul | 6-2,7-5 |
| ITF M15 Hua Hin | 2023/11/09 05:20 | Krittin Koaykul v Filip Peliwo | 1-6,2-6 |
| ITF M15 Hua Hin | 2023/11/08 04:50 | Michael Agwi v Krittin Koaykul | 4-6,3-6 |
| ITF M15 Nakhon Si Thammarat | 2024/07/01 01:55 | Natthayut Nithithananont v Ha Minh Duc Vu | 3-6,1-6 |
| ITF M15 Nakhon Si Thammarat | 2024/06/30 02:00 | Natthayut Nithithananont v Lleyton Richards | 6-2,7-5 |
| ITF M15 Hong Kong | 2024/06/18 04:40 | Natthayut Nithithananont v Shan-Yuan Ou | 0-6,1-6 |
| ITF M15 Hong Kong | 2024/06/17 02:00 | Natthayut Nithithananont v Chun-Ming Yam | 1-6,6-3,10-7 |
| ITF M15 Hong Kong | 2024/06/11 04:35 | Natthayut Nithithananont v Pengyu Lu | 3-6,1-6 |
| ITF M15 Nakhon Si Thammarat | 2024/02/29 06:25 | Natthayut Nithithananont v Maximus Jones | 1-6,2-6 |
| ITF M15 Nakhon Si Thammarat | 2024/02/28 02:00 | Natthayut Nithithananont v Jiayang Dong | 6-4,6-2 |
| ITF M15 Nakhon Si Thammarat Qual | 2024/02/18 03:40 | Yunseok Jang v Natthayut Nithithananont | 6-3,6-3 |