Stadium: Court 5 Round: 25 Ground: Hardcourt indoor
| Challenger Tampere | 2021/07/19 15:30 | JC Aragone v Pedja Krstin | 4-6,4-6 |
| Challenger Iasi | 2021/07/13 07:00 | Pedja Krstin v Dimitar Kuzmanov | 2-6,2-6 |
| ITF M25 Belgrade | 2021/06/30 11:30 | Pedja Krstin v Bogdan Pavel | 6-1,6-1 |
| Challenger Milan | 2021/06/25 13:50 | Pedja Krstin v Hugo Grenier | 4-6,4-6 |
| Challenger Milan | 2021/06/23 11:00 | Pedja Krstin v Manuel Guinard | 6-4,0-6,6-4 |
| Challenger Almaty | 2021/06/09 05:40 | Evan Furness v Pedja Krstin | 6-3,6-1 |
| Challenger Almaty | 2021/06/07 11:30 | Pedja Krstin v Mohamed Safwat | 6-4,6-0 |
| ATP Belgrade | 2021/05/25 13:55 | Alex Molcan v Pedja Krstin | 6-0,6-0 |
| Challenger Amersfoort | 2021/07/11 11:40 | Jeremy Jahn v Arjun Kadhe | 6-2,6-7,6-4 |
| ITF M15 New Delhi | 2021/04/01 06:25 | Arjun Kadhe v Alexander Kotzen | 0-6,4-6 |
| ITF M15 New Delhi | 2021/03/31 04:00 | Arjun Kadhe v Dominik Palan | 6-3,6-4 |
| ITF M15 Pune | 2021/03/26 06:00 | Oliver Crawford v Arjun Kadhe | 6-3,7-6 |
| ITF M15 Pune | 2021/03/25 07:40 | Dominik Palan v Arjun Kadhe | 6-1,6-7,6-7 |
| ITF M15 Pune | 2021/03/24 06:10 | S D Prajwal Dev v Arjun Kadhe | 3-6,6-7 |
| Challenger Potchefstroom Qual | 2021/02/14 12:25 | Arjun Kadhe v Viktor Durasovic | 2-6,1-6 |
| ITF M25 Villena | 2021/02/03 08:30 | Arjun Kadhe v Dan Added | 3-6,4-6 |