Stadium: Court 1 Round: 62 Ground: Clay
| ITF M15 Cairo | 2021/09/12 07:00 | Nitin Kumar Sinha v Leyton Rivera | 7-5,6-2 |
| ITF M15 Cairo | 2021/09/09 08:00 | Nitin Kumar Sinha v Santiago De La Fuente | 4-6,6-7 |
| ITF M15 Cairo | 2021/09/08 10:05 | Rishab Agarwal v Nitin Kumar Sinha | 6-7,6-0,4-6 |
| ITF M15 Cairo | 2021/09/01 09:50 | Valerio Aboian v Nitin Kumar Sinha | 6-4,6-1 |
| ITF M15 New Delhi | 2021/04/01 06:00 | Aidan Mchugh v Nitin Kumar Sinha | 5-7,7-6,7-6 |
| ITF M15 New Delhi | 2021/03/31 04:00 | Nitin Kumar Sinha v Abhinav Sanjeev Shanmugam | 6-2,6-0 |
| ITF M15 New Delhi | 2021/03/30 04:00 | Nitin Kumar Sinha v Henry Patten | 1-6,4-6 |
| ITF M15 New Delhi | 2021/03/28 14:00 | Nitin Kumar Sinha v Digvijay Pratap Singh | 4-6,6-3,10-7 |
| ITF M15 Cairo | 2021/09/12 07:00 | Adrian Oetzbach v Alessio De Bernardis | 6-0,6-2 |
| ITF M25 Eupen | 2021/09/06 09:45 | Juan Ignacio Galarza v Adrian Oetzbach | 7-6,6-3 |
| ITF M25 Eupen | 2021/09/05 10:30 | Moritz Poswiat v Adrian Oetzbach | 0-6,3-6 |
| ITF M15 Allershausen | 2021/09/01 09:00 | Manish Sureshkumar v Adrian Oetzbach | 3-6,6-4,6-4 |
| ITF M25 Poznan | 2021/08/26 09:00 | Shintaro Mochizuki v Adrian Oetzbach | 6-4,7-6 |
| ITF M25 Poznan | 2021/08/25 08:00 | Filip Bergevi v Adrian Oetzbach | 4-6,2-6 |
| ITF M25 Poznan | 2021/08/24 08:00 | Marcel Politowicz v Adrian Oetzbach | 3-6,2-6 |
| ITF M15 Oldenzaal | 2021/08/16 10:00 | Adrian Oetzbach v Karlo Cubelic | 5-7,7-5,3-10 |