Stadium: Centre Court Round: 25 Ground: Hardcourt outdoor
| ITF M15 Hua Hin | 2019/09/03 04:00 | Rishi Reddy v Nitin Kumar Sinha | 6-3,1-6,9-11 |
| ITF M15 Hua Hin | 2019/09/02 05:45 | Krittin Koaykul v Nitin Kumar Sinha | 3-6,2-6 |
| ITF M15 Hua Hin | 2019/08/27 09:10 | Yuanfeng Li v Nitin Kumar Sinha | 2-6,6-4,10-5 |
| ITF M15 Hua Hin | 2019/08/27 06:40 | Noppadol Noikor v Nitin Kumar Sinha | 3-6,3-6 |
| ITF M15 Hua Hin | 2019/08/19 03:00 | Nitin Kumar Sinha v Young-Hoon Jeong | 2-6,4-6 |
| ITF M25 Nonthaburi | 2019/07/30 04:45 | Nitin Kumar Sinha v Palaphoom Kovapitukted | 6-2,3-6,7-10 |
| ITF M25 Nonthaburi | 2019/07/29 08:00 | Nitin Kumar Sinha v Saranpong Borisutpong | 6-1,1-6,10-4 |
| ITF M25 Nonthaburi | 2019/07/22 04:45 | Thantub Suksumrarn v Nitin Kumar Sinha | 6-3,6-4 |
| ITF M15 Hua Hin | 2019/08/21 06:55 | Worarin Kumthonkittikul v Sung Jun Park | 3-6,2-6 |
| ITF M25 Nonthaburi | 2019/07/30 02:30 | Takashi Saito v Worarin Kumthonkittikul | 6-2,6-4 |
| ITF M25 Nonthaburi | 2019/07/29 02:30 | Kittirat Kerdlaphee v Worarin Kumthonkittikul | 3-6,6-2,5-10 |
| ITF M25 Nonthaburi | 2019/07/23 02:30 | Worarin Kumthonkittikul v Kunal Anand | 6-7,4-6 |
| ITF M25 Nonthaburi | 2019/07/22 02:30 | Shamirul S Mohd Adam Das v Worarin Kumthonkittikul | 4-6,6-2,6-10 |
| ITF M15 Singapore | 2019/06/12 06:30 | Worarin Kumthonkittikul v Christian Didier Chin | 6-3,6-7,1-6 |
| ITF M25 Nonthaburi | 2019/05/28 03:00 | Worarin Kumthonkittikul v Isaac Becroft | 3-6,2-6 |
| ITF M25 Nonthaburi | 2019/05/27 03:00 | Worarin Kumthonkittikul v Odeda Muhammad Arazza | 6-1,6-1 |