Stadium: Court 1 Round: 62 Ground: Clay
| ITF M15 Cochabamba | 2021/11/15 17:50 | Gonzalo Achondo v Juan Luis Yanine | 6-4,6-4 |
| ITF M25 Guayaquil | 2021/10/28 18:35 | Juan A H Serrano v Gonzalo Achondo | 6-0,6-1 |
| ITF M25 Guayaquil | 2021/10/26 16:20 | Juan Diego Rojas Mora v Gonzalo Achondo | 6-4,1-6,4-6 |
| ITF M15 Cairo | 2021/08/30 12:30 | Gonzalo Achondo v Lorenzo Gagliardo | 4-6,0-6 |
| ITF M15 Bad Waltersdorf | 2021/08/23 07:00 | Gonzalo Achondo v Philip Bachmaier | 0-6,3-6 |
| ITF M15 Warmbad-Villach | 2021/08/16 12:30 | Philip Bachmaier v Gonzalo Achondo | 6-1,6-3 |
| ITF M15 Warmbad-Villach | 2021/08/16 07:00 | Ivan Kazakov v Gonzalo Achondo | 6-3,0-6,8-10 |
| ITF M15 Xativa | 2021/08/02 07:00 | Francisco Andreu Garcia v Gonzalo Achondo | 6-3,6-1 |