Stadium: Court 4 Round: 46 Ground: Hardcourt outdoor
| 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 Perugia Qual | 2018/07/08 08:00 | Alejandro Gonzalez v Pol Toledo Bague | 2-6,7-5,3-6 |
| Challenger - Tiburon | 2018/09/22 18:20 | Pablo Vivero Gonzalez v Kaichi Uchida | 4-6,6-4,6-4 |
| Challenger - Columbus | 2018/09/15 22:20 | Jared Hiltzik v Pablo Vivero Gonzalez | 5-7,6-4,6-4 |
| Challenger - Cary | 2018/09/08 16:00 | Strong Kirchheimer v Pablo Vivero Gonzalez | 6-3,3-6,6-2 |
| Challenger - Sevila | 2018/09/01 08:00 | Zizou Bergs v Pablo Vivero Gonzalez | 6-4,6-4 |
| Challenger - Mallorca | 2018/08/26 11:15 | Teymuraz Gabashvili v Pablo Vivero Gonzalez | 7-5,6-1 |
| ITF Portugal F15 | 2018/08/17 13:05 | Sora Fukuda v Pablo Vivero Gonzalez | 7-6,2-6,6-4 |
| ITF Portugal F15 | 2018/08/16 10:40 | Alexander Donski v Pablo Vivero Gonzalez | 3-6,6-7 |
| ITF Portugal F15 | 2018/08/14 10:40 | Peter Bothwell v Pablo Vivero Gonzalez | 2-6,7-6,3-6 |