Stadium: Court 2 Round: 54 Ground: Hardcourt outdoor
| ITF M15 Hua Hin | 2019/08/19 06:05 | Kazuma Kawachi v Credit Chaiyarin | 2-6,4-6 |
| ITF M25 Nonthaburi | 2019/07/30 06:30 | Pol Wattanakul v Credit Chaiyarin | 6-2,4-6,6-4 |
| ITF M25 Nonthaburi | 2019/07/23 05:45 | Credit Chaiyarin v Soichiro Moritani | 2-6,3-6 |
| ITF Dominican Republic F1 | 2018/11/25 14:00 | Luis Britto v Credit Chaiyarin | 6-2,6-0 |
| ITF Dominican Republic F1 | 2018/11/24 14:30 | Credit Chaiyarin v Tomas Krcma | 6-1,6-1 |
| ITF USA F30 | 2018/11/03 19:00 | Cannon Kingsley v Credit Chaiyarin | 6-1,6-1 |
| ITF USA F29 | 2018/10/26 23:00 | Credit Chaiyarin v Jonathan Sorbo | 5-7,5-7 |
| ITF USA F28B | 2018/10/20 15:30 | Credit Chaiyarin v Joseph Corse | 4-6,6-1,6-7 |
| ITF M15 Hua Hin | 2019/08/19 05:15 | Krittin Koaykul v Kittirat Kerdlaphee | 6-4,1-6,15-13 |
| ITF M25 Nonthaburi | 2019/07/29 06:40 | Aaron Addison v Krittin Koaykul | 6-2,6-0 |
| ITF M25 Nonthaburi | 2019/07/23 03:45 | Daisuke Sumizawa v Krittin Koaykul | 6-4,1-6,11-9 |
| ITF M25 Nonthaburi | 2019/07/22 09:35 | Krittin Koaykul v Mehluli D A Sibanda | 6-4,6-4 |
| ITF M25 Nonthaburi | 2019/05/28 05:50 | Rio Noguchi v Krittin Koaykul | 6-3,6-0 |
| ITF M25 Nonthaburi | 2019/05/20 06:55 | Alexander Crnokrak v Krittin Koaykul | 6-1,6-4 |
| ITF M15 Anning | 2019/01/14 01:30 | Kazuma Kawachi v Krittin Koaykul | 7-6,6-2 |
| ITF M15 Anning | 2018/12/31 01:30 | Krittin Koaykul v Francesco Bessire | 3-6,2-6 |