Stadium: Court 3 Round: 26 Ground: Hardcourt outdoor
| ITF M15 Hua Hin | 2019/09/02 05:45 | Krittin Koaykul v Nitin Kumar Sinha | 3-6,2-6 |
| ITF M15 Addis Ababa | 2023/05/26 07:00 | Nitin Kumar Sinha v S D Prajwal Dev | 2-6,6-7 |
| ITF M15 Addis Ababa | 2023/05/23 08:00 | Yabets Kebede v Nitin Kumar Sinha | 0-6,3-6 |
| ITF M15 Addis Ababa | 2023/05/18 05:30 | Nitin Kumar Sinha v Nicolas Villalon | 6-3,3-6,6-7 |
| ITF M15 Chennai | 2023/04/05 03:30 | Vladyslav Orlov v Nitin Kumar Sinha | 6-3,7-5 |
| ITF M25 Mysuru | 2023/03/30 04:15 | Florent Bax v Nitin Kumar Sinha | 6-1,7-5 |
| ITF M25 Mysuru | 2023/03/29 04:35 | Nitin Kumar Sinha v Manish Sureshkumar | 2-6,6-4,6-4 |
| ITF M25 New Delhi | 2023/03/16 04:30 | Evgeny Donskoy v Nitin Kumar Sinha | 6-3,6-4 |
| ITF M25 New Delhi | 2023/03/15 06:45 | Nitin Kumar Sinha v Boris Butulija | 6-3,6-2 |
| ITF M15 Nakhon Si Thammarat | 2023/05/30 01:50 | Krittin Koaykul v Thanapet Chanta | 6-3,6-4 |
| ITF M25 Kashiwa | 2023/04/02 02:30 | Koki Matsuda v Krittin Koaykul | 6-3,6-3 |
| ITF M25 Tsukuba | 2023/03/27 00:30 | Krittin Koaykul v Shohei Chikami | 1-6,3-6 |
| ITF M15 Jakarta Qual | 2023/01/22 05:35 | Krittin Koaykul v Ha Minh Duc Vu | 6-4,4-6,4-10 |
| Challenger Nonthaburi | 2023/01/15 06:05 | Krittin Koaykul v Evgeny Donskoy | 2-6,4-6 |
| ITF M25 Jakarta | 2022/11/03 03:30 | Konstantin Kravchuk v Krittin Koaykul | 6-1,6-1 |
| ITF M25 Jakarta | 2022/11/02 02:00 | Krittin Koaykul v Congsup Congcar | 3-6,6-2,6-3 |
| ITF M25 Jakarta | 2022/10/31 06:40 | Krittin Koaykul v David Agung Susanto | 7-6,4-6,10-6 |