Stadium: Court 3 Round: 25 Ground: Clay
| Challenger Guayaquil | 2019/10/28 21:20 | Alejandro Gonzalez v Facundo Diaz Acosta | 6-4,3-6,4-6 |
| Challenger Todi | 2021/07/12 18:30 | Pedro Cachin v Facundo Diaz Acosta | 6-3,6-4 |
| Challenger Braunschweig | 2021/07/04 11:10 | Mats Rosenkranz v Facundo Diaz Acosta | 3-6,7-6,7-6 |
| ITF M25 - Most | 2021/05/29 08:30 | Facundo Diaz Acosta v Franco Agamenone | 4-6,3-6 |
| ITF M25 - Most | 2021/05/27 10:25 | Antoine Escoffier v Facundo Diaz Acosta | 7-5,3-6,3-6 |
| ITF M25 - Most | 2021/05/25 11:50 | Jiri Krouzek v Facundo Diaz Acosta | 4-6,3-6 |
| ITF M25 - Jablonec Nad Nisou | 2021/05/20 08:00 | Facundo Diaz Acosta v Franco Agamenone | 3-6,7-6,6-7 |
| ITF M25 - Jablonec Nad Nisou | 2021/05/19 07:55 | Adam Pavlasek v Facundo Diaz Acosta | 2-6,3-6 |
| ITF M15 - Valldoreix | 2021/05/15 09:00 | Alvaro Lopez San Martin v Facundo Diaz Acosta | 4-6,7-5,7-6 |
| Challenger Pozoblanco | 2021/07/18 16:35 | Inaki Montes-De La Torre v Alejandro Gonzalez | 5-7,6-4,6-3 |
| Challenger Iasi | 2021/07/12 09:50 | Miljan Zekic v Alejandro Gonzalez | 6-2,7-6 |
| Challenger Iasi | 2021/07/11 08:20 | Matei Cristian Onofrei v Alejandro Gonzalez | 0-6,1-6 |
| ITF M25 - Marburg | 2021/07/07 11:50 | Marvin Netuschil v Alejandro Gonzalez | 6-7,6-4,6-1 |
| ITF M25 - Santo Domingo | 2021/06/03 13:00 | Alejandro Gonzalez v Blaise Bicknell | 6-3,6-7,7-5 |
| ITF M25 - Pensacola | 2021/05/21 14:30 | Alejandro Gonzalez v Patrick Kypson | 4-6,0-6 |
| ITF M25 - Pensacola | 2021/05/20 14:25 | Juan A H Serrano v Alejandro Gonzalez | 3-6,2-6 |
| ITF M25 - Pensacola | 2021/05/19 19:35 | John Bernard v Alejandro Gonzalez | 2-6,1-6 |