Stadium: Court 5 Round: 62 Ground: Clay
| 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 Pune | 2021/03/21 09:15 | Nitin Kumar Sinha v Ishaque Eqbal | 6-7,6-7 |
| ITF M15 Indore | 2021/03/09 04:00 | Nitin Kumar Sinha v Oliver Crawford | 6-4,2-6,1-6 |
| ITF M15 Lucknow | 2021/03/03 07:40 | Aidan Mchugh v Nitin Kumar Sinha | 6-3,2-6,6-2 |
| ITF M15 Lucknow | 2021/03/01 04:00 | Nitin Kumar Sinha v Atharva Sharma | 6-2,6-1 |
| ITF M15 Bratislava | 2021/08/17 08:00 | Leyton Rivera v Tomas Lanik | 6-7,2-6 |
| ITF M15 Frederiksberg | 2021/08/04 09:25 | Ryan Nijboer v Leyton Rivera | 6-4,6-2 |
| ITF M15 Frederiksberg | 2021/08/02 11:05 | Nazim Makhlouf v Leyton Rivera | 3-6,6-3,3-10 |
| ITF M15 Frederiksberg | 2021/08/01 10:00 | Eirik Groener v Leyton Rivera | 2-6,5-7 |
| ITF M15 Poprad | 2021/07/05 08:00 | Dominik Palan v Leyton Rivera | 6-3,6-2 |
| ITF M15 Poprad | 2021/07/04 11:00 | Samo Polakovic v Leyton Rivera | 4-6,6-0,4-10 |
| ITF M15 Skopje | 2021/06/07 13:00 | Toby Martin v Leyton Rivera | 7-6,5-7,11-9 |
| ITF M15 Novomoskovsk | 2021/05/31 10:00 | Leyton Rivera v Dzianis Zharyn | 6-7,2-6 |