Stadium: Centre Court Round: 25 Ground: Hardcourt outdoor
| Hua Hin, Singles M-ITF-THA-07A | 2019/09/03 04:00 | Rishi Reddy v Nitin Kumar Sinha | 6-3,1-6,9-11 |
| Hua Hin, Singles M-ITF-THA-07A | 2019/09/02 05:45 | Krittin Koaykul v Nitin Kumar Sinha | 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 |
| Hua Hin, Singles M-ITF-THA-07A | 2019/08/21 06:55 | Kumthonkittikul, W. v Park, Sung Jun | 3-6,2-6 |
| Nonthaburi, Singles M-ITF-THA-01A | 2019/07/30 02:30 | Saito, Takashi v Kumthonkittikul, W. | 6-2,6-4 |
| Nonthaburi, Singles M-ITF-THA-01A | 2019/07/29 02:30 | Kerdlaphee, Kittirat v Kumthonkittikul, W. | 3-6,6-2,5-10 |
| Nonthaburi, Singles M-ITF-THA-01A | 2019/07/23 02:30 | Kumthonkittikul, W. v Anand, Kunal | 6-7,4-6 |
| Nonthaburi, Singles M-ITF-THA-01A | 2019/07/22 02:30 | Mohd Adam Das, Shamirul Shahril v Kumthonkittikul, W. | 4-6,6-2,6-10 |
| Singapore, Singles Qualifying M-ITF-SGP-01A | 2019/06/12 06:30 | Kumthonkittikul, W. v Chin, Christian Didier | 6-3,6-7,1-6 |
| Nonthaburi, Singles M-ITF-THA-01A | 2019/05/28 03:00 | Kumthonkittikul, W. v Becroft, Isaac | 3-6,2-6 |
| Nonthaburi, Singles M-ITF-THA-01A | 2019/05/27 03:00 | Kumthonkittikul, W. v Arazza, Odeda Muhammad | 6-1,6-1 |