Stadium: Court 2 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Heraklion | 2021/11/10 10:00 | Zsombor Velcz v Alec Deckers | 6-3,0-6,4-6 |
| ITF M15 Heraklion | 2021/11/09 07:00 | Zsombor Velcz v Preston Brown | 2-6,6-3,10-4 |
| ITF M15 Heraklion | 2021/11/08 09:00 | Zsombor Velcz v Ioannis Kountourakis | 7-5,6-0 |
| ITF M15 Heraklion | 2021/11/03 07:00 | Gorazd Srbljak v Zsombor Velcz | 6-4,6-4 |
| ITF M15 Doha | 2021/10/13 12:30 | Zsombor Velcz v Tom Kocevar-Desman | 2-6,1-6 |
| ITF M25 Budapest | 2021/09/28 07:30 | Zsombor Velcz v Attila Dominik Boros | 7-5,6-7,4-6 |
| ITF M15 Zlatibor | 2021/09/17 10:55 | Yan Bondarevskiy v Zsombor Velcz | 6-4,6-1 |
| ITF M15 Zlatibor | 2021/09/16 11:30 | Zsombor Velcz v Sebastian Gima | 6-3,6-4 |
| ITF M15 New Delhi | 2021/11/16 04:00 | Siddharth Vishwakarma v Lohithaksha Bathrinath | 6-3,7-5 |
| ITF M15 New Delhi | 2021/11/15 04:00 | Siddharth Vishwakarma v Bharath Nishok Kumaran | 6-4,6-1 |
| ITF M15 New Delhi | 2021/11/14 08:00 | Siddharth Vishwakarma v Theertha Shashank Macherla | 6-2,6-4 |
| ITF M15 New Delhi | 2021/03/31 09:40 | Marco Brugnerotto v Siddharth Vishwakarma | 6-4,5-7,6-4 |
| ITF M15 New Delhi | 2021/03/28 10:30 | Siddharth Vishwakarma v Jonathan Binding | 6-3,6-2 |
| ITF M15 New Delhi | 2021/03/28 05:00 | Anirudh Chandrasekar v Siddharth Vishwakarma | 7-5,3-6,9-11 |
| ITF M15 Indore | 2021/03/10 03:30 | Madhwin Kamath v Siddharth Vishwakarma | 2-6,6-4,6-4 |
| ITF M15 Indore | 2021/03/08 08:30 | Digvijay Pratap Singh v Siddharth Vishwakarma | 1-6,4-6 |