Stadium: Court 1 Round: 45 Ground: Hardcourt outdoor
| Challenger Knoxville | 2018/11/05 16:40 | Redlicki, Michael v Gonzalez, Alejandro | 7-6,3-6,7-5 |
| Challenger Charlottesville | 2018/10/28 14:00 | Ymer, Mikael v Gonzalez, Alejandro | 6-2,6-3 |
| Challenger Charlottesville | 2018/10/27 17:55 | Isaiah Strode v Gonzalez, Alejandro | 1-6,2-6 |
| Challenger Las Vegas | 2018/10/20 20:45 | Alex Rybakov v Gonzalez, Alejandro | 6-2,7-6 |
| Challenger Calgary | 2018/10/16 19:20 | Gonzalez, Alejandro v Casper Ruud | 6-3,5-7,6-7 |
| Challenger Campinas | 2018/10/04 15:00 | Gonzalez, Alejandro v Cristian Garin | 3-6,1-6 |
| Challenger Campinas | 2018/10/02 13:00 | Gonzalez, Alejandro v Arguello, Facundo | 6-3,7-6 |
| Challenger Tiburon | 2018/09/23 17:00 | Gonzalez, Alejandro v Vivero Gonzalez, Pablo | 3-6,1-6 |
| ITF USA F28B | 2018/10/26 17:40 | Smith, Roy v Chang, Jonathan | 6-2,6-2 |
| ITF USA F28B | 2018/10/25 21:15 | Chang, Jonathan v Findel-Hawkins, Jack | 4-6,6-4,7-6 |
| ITF USA F28B | 2018/10/25 16:00 | Redlicki, Michael v Chang, Jonathan | 4-6,1-6 |
| ITF USA F28B | 2018/10/23 18:40 | Lucas Poullain v Chang, Jonathan | 3-6,3-6 |
| ITF USA F28B | 2018/10/22 17:45 | Chang, Jonathan v Alastair Gray | 6-2,0-6,7-6 |
| ITF USA F28B | 2018/10/21 15:00 | Chang, Jonathan v Papa, Spencer | 3-6,6-3,6-1 |
| ITF USA F28 | 2018/10/17 14:30 | Oliver Crawford v Chang, Jonathan | 6-1,6-2 |
| ITF USA F28 | 2018/10/15 14:35 | Marson, Guido v Chang, Jonathan | 4-6,2-6 |