Stadium: Court 5 Round: 54 Ground: Hardcourt outdoor
| 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 Thailand F8 | 2018/11/03 02:00 | Phongsapak Kerdlaphee v Krittin Koaykul | 6-2,6-4 |
| ITF Thailand F7 | 2018/10/28 03:00 | Krittin Koaykul v Siddharth Vishwakarma | 2-6,5-7 |
| ITF Thailand F7 | 2018/10/27 02:00 | Michael Mathayomchand v Krittin Koaykul | 3-6,5-7 |
| ITF Thailand F6 | 2018/10/10 03:00 | Krittin Koaykul v Matic Spec | 0-6,1-6 |
| ITF Thailand F6 | 2018/10/08 03:30 | Yuttana Charoenphon v Krittin Koaykul | 6-7,2-6 |
| ITF M15 Troisdorf | 2019/05/06 07:00 | Nitin Kumar Sinha v Maximilian Dietel | 6-1,4-6,1-10 |
| ITF M15 Antalya | 2019/03/28 08:30 | Nitin Kumar Sinha v Marvin Netuschil | 5-7,2-6 |
| ITF M15 Antalya | 2019/03/26 07:00 | Nitin Kumar Sinha v David Juras | 6-1,6-1 |
| ITF M15 Antalya | 2019/03/18 07:15 | Nitin Kumar Sinha v Sandro Kopp | 4-6,1-6 |
| ITF M15 Antalya | 2019/03/12 10:00 | Nitin Kumar Sinha v Sarp Agabigun | 6-2,6-7,4-10 |
| ITF M15 Antalya | 2019/03/11 07:15 | Nitin Kumar Sinha v Ruben Busch | 7-6,6-0 |
| ITF M15 Anning | 2019/01/11 04:40 | Kazuki Nishiwaki v Nitin Kumar Sinha | 6-7,6-2,6-4 |
| ITF M15 Anning | 2019/01/10 07:15 | Li-Wei Tan v Nitin Kumar Sinha | 6-3,5-7,4-6 |