Stadium: Court 7 Round: 25 Ground: Clay
| Challenger Amersfoort | 2021/07/12 14:05 | JC Aragone v Jelle Sels | 1-6,1-6 |
| ITF M25 Tulsa | 2021/06/16 16:25 | JC Aragone v Nicolas Kicker | 6-1,4-6,3-6 |
| Challenger Orlando | 2021/06/12 15:00 | JC Aragone v Nicolas Mejia | 6-1,6-7,0-6 |
| Challenger Orlando | 2021/06/11 15:00 | JC Aragone v Emilio Gomez | 6-4,7-5 |
| Challenger Orlando | 2021/06/10 14:00 | JC Aragone v Thiago Agustin Tirante | 6-3,7-5 |
| Challenger Orlando | 2021/06/07 19:50 | Yasutaka Uchiyama v JC Aragone | 5-7,2-6 |
| Challenger Little Rock | 2021/06/02 20:50 | Alexis Galarneau v JC Aragone | 6-3,6-3 |
| UTR Pro Tennis Series California | 2021/05/28 18:00 | JC Aragone v Colton Smith | 4-6,6-4,4-5 |
| 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 |
| ATP Belgrade | 2021/05/23 10:30 | Pedja Krstin v Soonwoo Kwon | 6-2,3-6,6-1 |