Stadium: Court 1 Round: 45 Ground: Hardcourt outdoor
| Challenger Knoxville | 2018/11/05 16:40 | Michael Redlicki v Alejandro Gonzalez | 7-6,3-6,7-5 |
| 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 |
| ITF USA F28B | 2018/10/26 17:40 | Roy Smith v Jonathan Chang | 6-2,6-2 |
| ITF USA F28B | 2018/10/25 21:15 | Jonathan Chang v Jack Findel-Hawkins | 4-6,6-4,7-6 |
| ITF USA F28B | 2018/10/25 16:00 | Michael Redlicki v Jonathan Chang | 4-6,1-6 |
| ITF USA F28B | 2018/10/23 18:40 | Lucas Poullain v Jonathan Chang | 3-6,3-6 |
| ITF USA F28B | 2018/10/22 17:45 | Jonathan Chang v Alastair Gray | 6-2,0-6,7-6 |
| ITF USA F28B | 2018/10/21 15:00 | Jonathan Chang v Spencer Papa | 3-6,6-3,6-1 |
| ITF USA F28 | 2018/10/17 14:30 | Oliver Crawford v Jonathan Chang | 6-1,6-2 |
| ITF USA F28 | 2018/10/15 14:35 | Guido Marson v Jonathan Chang | 4-6,2-6 |