Stadium: C Round: 46 Ground: Hardcourt outdoor
| Challenger Cary | 2018/09/08 15:20 | Sarkissian, Alexander v Roelofse, Ruan | 6-4,6-3 |
| Challenger Chicago | 2018/09/06 17:45 | Sarkissian, Alexander v Aragone, JC | 6-2,6-7,6-7 |
| Challenger Chicago | 2018/09/05 15:00 | Seppi, Andreas v Sarkissian, Alexander | 3-6,6-7 |
| Challenger Chicago | 2018/09/03 22:20 | Roelofse, Ruan v Sarkissian, Alexander | 3-6,4-6 |
| Challenger Chicago | 2018/09/02 21:35 | Hiltzik, Aron v Sarkissian, Alexander | 1-6,2-6 |
| Challenger Chicago | 2018/09/02 16:40 | Aleksandar Vukic v Sarkissian, Alexander | 3-6,4-6 |
| Vancouver, Canada | 2018/08/13 19:00 | Gojo, Borna v Sarkissian, Alexander | 7-6,6-4 |
| Challenger Aptos | 2018/08/05 17:00 | Sarkissian, Alexander v Aleksandar Vukic | 5-7,2-6 |
| Challenger Cary | 2018/09/08 14:00 | Turzak, Robert v Schneider, Ronnie | 1-6,1-6 |
| ITF Thailand F2 | 2018/08/31 02:00 | Schneider, Ronnie v Fayziev, Sanjar | 6-4,5-7,4-6 |
| ITF Thailand F2 | 2018/08/30 02:00 | Thomas Fancutt v Schneider, Ronnie | 4-6,1-6 |
| ITF Thailand F2 | 2018/08/29 02:45 | Navasirisomboon, Jirat v Schneider, Ronnie | 1-6,4-6 |
| ITF Thailand F1 | 2018/08/25 02:00 | Schneider, Ronnie v Kelly, Dayne | 6-4,6-4 |
| ITF Thailand F1 | 2018/08/24 03:00 | Thomas Fancutt v Schneider, Ronnie | 6-7,3-6 |
| ITF Thailand F1 | 2018/08/23 03:00 | Schneider, Ronnie v Tanuma, Ryota | 6-4,6-4 |
| ITF Thailand F1 | 2018/08/22 02:00 | Schneider, Ronnie v Nitin Kumar Sinha | 6-0,6-2 |