Stadium: Court 2 Round: 54 Ground: Hardcourt outdoor
| 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 |
| ITF Thailand F9 | 2018/11/10 05:00 | Krittin Koaykul v Chayanon Kaewsuto | 2-6,6-1,3-6 |
| ITF - M25 Nonthaburi | 2019/07/29 02:30 | Kittirat Kerdlaphee v Worarin Kumthonkittikul | 3-6,6-2,5-10 |
| ITF - M25 Nonthaburi | 2019/07/22 07:55 | Billy Harris v Kittirat Kerdlaphee | 6-4,6-2 |
| ITF - M15 Anseong | 2019/06/25 01:00 | Kittirat Kerdlaphee v Hyung-Chan Lim | 5-7,5-7 |
| ITF - M15 Anseong | 2019/06/24 02:00 | Kittirat Kerdlaphee v Cheong Hwi Kim | 6-7,6-4,10-7 |
| ITF M15 Gimcheon | 2019/06/18 01:00 | Ju-Hae Moon v Kittirat Kerdlaphee | 6-0,6-0 |
| ITF M15 Gimcheon | 2019/06/17 06:25 | Dylan Seong Kwan Kim v Kittirat Kerdlaphee | 2-6,1-6 |
| ITF - M25 Nonthaburi | 2019/05/27 05:30 | Kittirat Kerdlaphee v Noppadol Noikor | 6-3,6-1 |
| ITF - M25 Nonthaburi | 2019/05/20 03:00 | Pawin Jirapoomdaje v Kittirat Kerdlaphee | 4-6,4-6 |