Stadium: Court 4 Round: 62 Ground: Hardcourt outdoor
| Challenger Puerto Vallarta Qual | 2018/04/28 18:15 | Alexander Merino v Boris Arias | 6-3,4-6,2-6 |
| ITF Tunisia F12 | 2018/03/28 08:30 | Alexander Merino v Jordi Munoz-Abreu | 3-6,1-6 |
| ITF Tunisia F11 | 2018/03/18 08:30 | Alexander Merino v Daniele Catini | 7-5,5-7,3-6 |
| ITF Tunisia F11 | 2018/03/17 08:00 | Alexander Merino v Juan M G Paiva | 6-1,6-0 |
| ITF Tunisia F10 | 2018/03/14 14:20 | Simone Roncalli v Alexander Merino | 6-4,6-0 |
| ITF Tunisia F10 | 2018/03/10 08:30 | Gabriele Maria Noce v Alexander Merino | 4-6,3-6 |
| ITF Tunisia F9 | 2018/03/03 10:30 | Alexander Merino v Mitchell Thomas McDaniels | 4-6,3-6 |
| ITF Tunisia F8 | 2018/02/25 11:00 | Edoardo Lamberti v Alexander Merino | 3-6,6-4,6-4 |
| ITF Mexico F1 | 2018/05/05 16:00 | Marcelo Sepulveda v Conner McMann | 4-6,6-3,6-1 |
| Challenger Puerto Vallarta | 2018/05/01 00:45 | Marcelo Sepulveda v Santiago Giraldo | 2-6,0-6 |
| ITF USA F12 | 2018/04/22 17:00 | Marcelo Sepulveda v Julian Bradley | 6-7,7-6,3-6 |
| ITF USA F12 | 2018/04/20 12:00 | Marcelo Sepulveda v Yang Liu | 6-2,6-2 |
| ITF USA F11 | 2018/04/16 14:00 | Christopher G Haworth v Marcelo Sepulveda | 4-6,6-1,6-4 |
| ITF USA F11 | 2018/04/15 12:00 | Charles Sullivan v Marcelo Sepulveda | 2-6,3-6 |
| ITF USA F10 Qual | 2018/04/08 17:30 | Alexander Ritschard v Marcelo Sepulveda | 6-3,6-0 |
| ITF USA F3 Qual | 2018/01/07 16:00 | Trent Bryde v Marcelo Sepulveda | 6-4,7-5 |