Stadion: Quadra 3 Round: 25 Ground: Clay
| Challenger - Tiburon | 2018/09/23 17:00 | Alejandro Gonzalez v Pablo Vivero Gonzalez | 3-6,1-6 |
| Challenger - Tiburon | 2018/09/22 18:50 | Alexander Ritschard v Alejandro Gonzalez | 1-6,4-6 |
| Challenger - Columbus | 2018/09/18 17:55 | Luke Saville v Alejandro Gonzalez | 7-5,6-4 |
| Challenger - Cary | 2018/09/13 19:40 | Alejandro Gonzalez v Bjorn Fratangelo | 7-6,5-7,4-6 |
| Challenger - Cary | 2018/09/12 17:00 | Alejandro Gonzalez v Mikael Ymer | 4-6,6-3,6-4 |
| Challenger - Cary | 2018/09/10 20:40 | Peter Polansky v Alejandro Gonzalez | 3-6,4-6 |
| Challenger - Chicago | 2018/09/02 22:10 | Alejandro Gonzalez v Ruan Roelofse | 4-6,6-3,3-6 |
| Challenger - Astana | 2018/07/17 05:55 | Mikhail Youzhny v Alejandro Gonzalez | 6-3,2-6,7-5 |
| Challenger - Biella | 2018/09/21 09:00 | Facundo Arguello v Federico Delbonis | 2-6,4-6 |
| Challenger - Biella | 2018/09/20 09:30 | Facundo Arguello v Filippo Baldi | 6-4,6-2 |
| Challenger - Biella | 2018/09/18 08:00 | Gastao Elias v Facundo Arguello | 5-7,0-6 |
| Challenger - Stettin | 2018/09/15 11:00 | Guido Andreozzi v Facundo Arguello | 3-6,7-6,6-4 |
| Challenger - Stettin | 2018/09/14 12:55 | Rogerio Dutra Silva v Facundo Arguello | 6-4,3-6,2-6 |
| Challenger - Stettin | 2018/09/12 15:00 | Facundo Arguello v Roberto Carballes Baena | 7-6,6-3 |
| Challenger - Stettin | 2018/09/10 09:00 | Roberto Marcora v Facundo Arguello | 6-3,2-6,1-6 |
| Challenger - Stettin | 2018/09/09 09:00 | Jorge Montero v Facundo Arguello | 6-2,3-6,2-6 |