Stadium: Court 18 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 Bolivia F1 | 2017/09/19 15:30 | Alexander Merino v Boris Arias | 2-6,6-7 |
| ITF Mexico F2 | 2018/05/13 16:00 | Boris Arias v Aydan Gomez Osorio | 6-2,6-1 |
| ITF Mexico F1 | 2018/05/08 18:15 | Boris Arias v Christopher Diaz-Figueroa | 6-3,3-6,4-6 |
| Challenger Puerto Vallarta Qual | 2018/04/29 16:00 | Boris Arias v Christopher Diaz-Figueroa | 1-6,6-7 |
| Challenger Puerto Vallarta Qual | 2018/04/28 18:15 | Alexander Merino v Boris Arias | 6-3,4-6,2-6 |
| Davis Cup | 2018/04/08 16:40 | Boris Arias v Juan E Marrero | 6-3,6-1 |
| Challenger San Luis Potosi Qual | 2018/03/25 20:25 | Cristian Rodriguez v Boris Arias | 4-6,6-1,6-2 |
| ITF USA F8 Qual | 2018/03/18 16:00 | Or Ram-Harel v Boris Arias | 6-1,6-2 |
| ITF USA F7 Qual | 2018/03/12 18:45 | Ricardo Rodriguez-Pace v Boris Arias | 6-3,7-5 |
| ITF Mexico F2 | 2018/05/12 16:00 | Jody Turnquest v Alexander Merino | 2-6,4-6 |
| ITF Mexico F1 | 2018/05/07 15:00 | Alexander Merino v Trey Hilderbrand | 6-7,3-6 |
| ITF Mexico F1 | 2018/05/06 16:00 | Alexander Merino v Marcelo Sepulveda | 6-2,5-7,6-3 |
| 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 |