Stadium: Cancha 1 Round: 24 Ground: Hardcourt outdoor
| Challenger Charlottesville | 2018/10/28 14:00 | Mikael Ymer v Alejandro Gonzalez | 6-2,6-3 |
| Challenger Charlottesville | 2018/10/27 17:55 | Isaiah Strode v Alejandro Gonzalez | 1-6,2-6 |
| Challenger Las Vegas | 2018/10/20 20:45 | Alex Rybakov v Alejandro Gonzalez | 6-2,7-6 |
| Challenger Calgary | 2018/10/16 19:20 | Alejandro Gonzalez v Casper Ruud | 6-3,5-7,6-7 |
| Challenger Campinas | 2018/10/04 15:00 | Alejandro Gonzalez v Cristian Garin | 3-6,1-6 |
| Challenger Campinas | 2018/10/02 13:00 | Alejandro Gonzalez v Facundo Arguello | 6-3,7-6 |
| 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 Eckental | 2018/10/28 13:45 | Albano Olivetti v Johannes Haerteis | 6-3,6-4 |
| Challenger Eckental | 2018/10/27 14:00 | Johannes Haerteis v Tim Hofmann | 6-3,6-1 |
| Challenger Ismaning | 2018/10/20 15:05 | Johannes Haerteis v Gleb Sakharov | 4-6,2-6 |
| Challenger Ismaning | 2018/10/19 16:40 | Daniel Masur v Johannes Haerteis | 5-7,3-6 |
| Challenger Ismaning | 2018/10/18 12:00 | Lukas Klein v Johannes Haerteis | 3-6,6-4,5-7 |
| Challenger Ismaning | 2018/10/17 14:25 | Johannes Haerteis v Dennis Novak | 0-6,7-6,7-5 |
| Challenger Ismaning | 2018/10/15 10:30 | Szymon Walkow v Johannes Haerteis | 4-6,4-6 |
| Challenger Ismaning | 2018/10/14 10:20 | Marek Gengel v Johannes Haerteis | 2-6,2-6 |