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