Stadium: Court 4 Round: 62 Ground: Hardcourt outdoor
| ITF - M15 Sharm El Sheikh | 2021/02/14 16:00 | Karlo Cubelic v Nitin Kumar Sinha | 6-4,6-3 |
| ITF - M15 Sharm El Sheikh | 2021/02/07 14:30 | Daisuke Sumizawa v Nitin Kumar Sinha | 6-3,7-6 |
| ITF - M15 Sharm El Sheikh | 2021/02/02 10:50 | Daisuke Sumizawa v Nitin Kumar Sinha | 6-3,6-3 |
| ITF - M15 Sharm El Sheikh | 2021/02/01 08:00 | Nitin Kumar Sinha v Presuhn, Bastien | 6-1,7-5 |
| ITF - M15 Sharm El Sheikh | 2021/01/31 09:00 | Chandrasekar, Anirudh v Nitin Kumar Sinha | 3-6,4-6 |
| Kolkata, Singles M-ITF-IND-01B | 2020/03/12 04:00 | Niklas Schell v Nitin Kumar Sinha | 6-3,3-6,0-6 |
| Nonthaburi, Singles M-ITF-THA-01A | 2020/02/03 04:55 | Nitin Kumar Sinha v Rapp, Austin | 1-6,6-3,8-10 |
| Nonthaburi, Singles M-ITF-THA-01A | 2020/02/02 09:45 | Nitin Kumar Sinha v Pokinsagethasiri, Shisanuphong | 6-3,2-6,13-11 |