Stadium: Court 5 Round: 54 Ground: Hardcourt outdoor
| Hua Hin, Singles M-ITF-THA-07A | 2019/08/19 05:15 | Krittin Koaykul v Kerdlaphee, Kittirat | 6-4,1-6,15-13 |
| Nonthaburi, Singles M-ITF-THA-01A | 2019/07/29 06:40 | Addison, Aaron v Krittin Koaykul | 6-2,6-0 |
| Nonthaburi, Singles M-ITF-THA-01A | 2019/07/23 03:45 | Daisuke Sumizawa v Krittin Koaykul | 6-4,1-6,11-9 |
| Nonthaburi, Singles M-ITF-THA-01A | 2019/07/22 09:35 | Krittin Koaykul v Sibanda, Mehluli Don Ayanda | 6-4,6-4 |
| Nonthaburi, Singles M-ITF-THA-01A | 2019/05/28 05:50 | Rio Noguchi v Krittin Koaykul | 6-3,6-0 |
| Nonthaburi, Singles M-ITF-THA-01A | 2019/05/20 06:55 | Crnokrak, Alexander 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 Bessire, Francesco | 3-6,2-6 |
| Hua Hin, Singles M-ITF-THA-07A | 2019/08/27 09:10 | Li, Yuanfeng v Nitin Kumar Sinha | 2-6,6-4,10-5 |
| Hua Hin, Singles M-ITF-THA-07A | 2019/08/27 06:40 | Noikor, Noppadol v Nitin Kumar Sinha | 3-6,3-6 |
| Hua Hin, Singles M-ITF-THA-07A | 2019/08/19 03:00 | Nitin Kumar Sinha v Jeong, Young-Hoon | 2-6,4-6 |
| Nonthaburi, Singles M-ITF-THA-01A | 2019/07/30 04:45 | Nitin Kumar Sinha v Kovapitukted, Palaphoom | 6-2,3-6,7-10 |
| Nonthaburi, Singles M-ITF-THA-01A | 2019/07/29 08:00 | Nitin Kumar Sinha v Borisutpong, Pattanapong | 6-1,1-6,10-4 |
| Nonthaburi, Singles M-ITF-THA-01A | 2019/07/22 04:45 | Suksumrarn, Thantub v Nitin Kumar Sinha | 6-3,6-4 |
| ITF M25 Kassel | 2019/07/16 09:50 | Nitin Kumar Sinha v Daljev, Pavle | 6-0,4-6,7-10 |
| ITF M25 Kassel | 2019/07/15 11:00 | Nitin Kumar Sinha v Loccisano, Mike | 6-3,6-3 |