Stadium: Court 5 Round: 44 Ground: Clay
| ITF M15 - Ibague | 2021/09/08 17:00 | Nicolas Buitrago v Cristobal Castro | 6-3,6-1 |
| ITF M15 - Ibague | 2021/09/07 14:00 | Cristobal Castro v Amador Salazar | 7-6,6-4 |
| ITF M15 - Ibague | 2021/09/05 16:30 | Cristobal Castro v Patricio Embry | 6-3,6-3 |
| ITF M25 - Guayaquil | 2021/08/02 17:00 | Noah Schachter v Cristobal Castro | 7-6,6-3 |
| ITF M25 - Guayaquil | 2021/08/01 19:00 | Nicolas Esteban Rico Arias v Cristobal Castro | 1-6,4-6 |
| ITF M25 - Guayaquil | 2021/08/01 14:00 | Miguel L Sicco v Cristobal Castro | 6-7,2-6 |
| ITF M25 - Portoviejo | 2021/07/28 14:30 | Jose Pereira v Cristobal Castro | 6-2,6-1 |
| ITF M25 - Portoviejo | 2021/07/26 17:45 | Andres Urrea v Cristobal Castro | 4-6,7-5,5-10 |
| ITF M15 - Ibague | 2021/09/05 18:00 | Kevin Gonzalez v Nicolas Esteban Rico Arias | 2-6,6-2,6-10 |