Stadium: Estadio Puerto Vallarta Round: 14 Ground: Hardcourt outdoor
| Challenger Champaign | 2021/11/18 17:00 | Krstin, Pedja v Ben Shelton | 6-4,0-6,1-6 |
| Challenger Champaign | 2021/11/16 22:10 | Krstin, Pedja v Arjun Kadhe | 7-5,7-5 |
| Challenger Guayaquil | 2021/11/02 17:10 | Hugo Dellien v Krstin, Pedja | 6-4,6-2 |
| Challenger Lima | 2021/10/26 23:00 | Juan Pablo Varillas v Krstin, Pedja | 6-3,6-1 |
| Bogota, Colombia | 2021/10/19 16:30 | Goncalo Oliveira v Krstin, Pedja | 3-6,6-3,6-2 |
| Challenger - Barcelone | 2021/10/05 09:45 | Krstin, Pedja v Nicola Kuhn | 4-6,4-6 |
| Challenger Banja Luka | 2021/09/06 11:55 | Krstin, Pedja v Nicolas Moreno De Alboran | 6-2,3-6,6-2 |
| Challenger - Barletta | 2021/08/25 09:00 | Krstin, Pedja v Dougaz, Aziz | 2-6,2-6 |
| ITF M25 Guayaquil | 2021/10/27 17:40 | Juan Bautista Torres v Patino, Luis | 5-7,6-2,6-4 |
| ITF M25 Guayaquil | 2021/10/25 17:05 | Patino, Luis v Camilo Benavides Soto | 6-1,6-1 |
| Bogota, Colombia | 2021/10/17 15:00 | Enzo Couacaud v Patino, Luis | 6-2,6-3 |
| Alicante, Spain | 2021/10/10 09:35 | Patino, Luis v Georgii Kravchenko | 2-6,1-6 |
| ITF M25 Setubal | 2021/10/05 13:15 | Patino, Luis v Luciano Darderi | 6-2,3-6,3-6 |
| ITF M25 Sintra | 2021/09/15 09:00 | Patino, Luis v Cabral, Francisco | 4-6,7-6,1-6 |
| ITF M25 Sintra | 2021/09/07 08:30 | Patino, Luis v Jesse Flores | 2-6,6-3,5-10 |
| ITF M25 Sintra | 2021/09/06 10:20 | Patino, Luis v Matias P D L Gomila | 6-4,6-4 |