Stadium: Estadio Puerto Vallarta Round: 25 Ground: Hardcourt outdoor
| Challenger Leon | 2018/04/27 20:55 | Quiroz, Roberto v Sarkissian, Alexander | 6-4,7-6 |
| Challenger Leon | 2018/04/25 21:55 | Hernandez-Fernandez, Jose v Sarkissian, Alexander | 6-7,6-7 |
| Challenger Guadalajara | 2018/04/19 21:00 | Arevalo-Gonzalez, Marcelo v Sarkissian, Alexander | 6-3,6-3 |
| Challenger Guadalajara | 2018/04/17 17:00 | Heyman, Christopher v Sarkissian, Alexander | 4-6,6-7 |
| Challenger - San Luis Potosí | 2018/03/28 19:40 | Roberto Cid Subervi v Sarkissian, Alexander | 6-2,6-0 |
| ITF USA F8 | 2018/03/23 19:20 | Laurent Lokoli v Sarkissian, Alexander | 6-3,6-1 |
| ITF USA F8 | 2018/03/20 22:20 | Bryde, Trent v Sarkissian, Alexander | 1-6,2-6 |
| USA F7, Singles Qualifying | 2018/03/15 00:00 | Gojo, Borna v Sarkissian, Alexander | 4-6,6-1,6-4 |
| Challenger Guadalajara | 2018/04/17 19:40 | Lopez Villasenor, Gerardo v Christopher Eubanks | 1-6,6-3,6-7 |
| Coupe Davis | 2018/04/07 17:00 | Lopez Villasenor, Gerardo v Juan Pablo Varillas | 6-4,7-6 |
| Challenger - San Luis Potosí | 2018/03/27 18:00 | Lopez Villasenor, Gerardo v Krstin, Pedja | 2-6,3-6 |
| Challenger - Morelos | 2018/02/22 00:40 | Lopez Villasenor, Gerardo v King, Kevin | 1-6,1-6 |
| Challenger - Morelos | 2018/02/20 20:35 | Vilella Martinez, Mario v Lopez Villasenor, Gerardo | 4-6,6-4,4-6 |
| Challenger Morelos Qual | 2018/02/18 18:40 | Lopez Villasenor, Gerardo v Song, Evan | 1-6,6-3,6-4 |
| Challenger Morelos Qual | 2018/02/17 20:00 | Aragone, JC v Lopez Villasenor, Gerardo | 6-7,6-1,5-7 |
| Challenger Morelos Qual | 2018/02/17 15:00 | Lopez Villasenor, Gerardo v Schnur, Max Jacob | 6-3,7-6 |