Stadium: Court 5 Round: 25 Ground: Hardcourt indoor
| Challenger Guayaquil | 2021/11/02 17:10 | Hugo Dellien v Pedja Krstin | 6-4,6-2 |
| Challenger Lima | 2021/10/26 23:00 | Juan Pablo Varillas v Pedja Krstin | 6-3,6-1 |
| Challenger Bogota | 2021/10/19 16:30 | Goncalo Oliveira v Pedja Krstin | 3-6,6-3,6-2 |
| Challenger Barcelona | 2021/10/05 09:45 | Pedja Krstin v Nicola Kuhn | 4-6,4-6 |
| Challenger Banja Luka | 2021/09/06 11:55 | Pedja Krstin v Nicolas Moreno De Alboran | 6-2,3-6,6-2 |
| Challenger Barletta | 2021/08/25 09:00 | Pedja Krstin v Mohamed Aziz Dougaz | 2-6,2-6 |
| Challenger Trieste | 2021/07/29 14:50 | Damir Dzumhur v Pedja Krstin | 6-3,6-1 |
| Challenger Trieste | 2021/07/28 08:00 | Pedja Krstin v Viktor Durasovic | 6-3,6-2 |
| Challenger Champaign | 2021/11/15 17:50 | Arjun Kadhe v Evan King | 6-4,6-7,6-2 |
| Challenger Champaign | 2021/11/14 19:20 | Mukund Sasikumar v Arjun Kadhe | 4-6,6-3,3-6 |
| Challenger Knoxville | 2021/11/07 18:10 | Aidan Mchugh v Arjun Kadhe | 6-3,7-6 |
| Challenger Charlottesville | 2021/10/31 15:00 | Christian Harrison v Arjun Kadhe | 6-2,6-2 |
| Challenger Losinj | 2021/10/19 10:40 | Filip Misolic v Arjun Kadhe | 6-1,6-2 |
| Challenger Losinj | 2021/10/17 10:00 | Jamie Cerretani v Arjun Kadhe | 3-6,0-6 |
| Challenger Napoli Qual | 2021/10/10 16:40 | Alexander Ritschard v Arjun Kadhe | 6-3,6-3 |
| Challenger Rennes | 2021/09/12 11:35 | Manuel Guinard v Arjun Kadhe | 6-4,1-6,6-3 |