Stadium: Court 4 Round: 45 Ground: Hardcourt outdoor
| ITF USA F4 | 2015/01/17 19:00 | Frederik Nielsen v Alexander Sarkissian | 3-6,6-4,6-3 |
| Challenger Cary | 2018/09/08 18:20 | Frederik Nielsen v Evan Song | 2-6,6-7 |
| Challenger Chicago | 2018/09/02 22:00 | Kaichi Uchida v Frederik Nielsen | 6-3,6-4 |
| Challenger Chicago | 2018/09/02 15:00 | Joris De Loore v Frederik Nielsen | 6-7,6-2,5-7 |
| Challenger Portoroz | 2018/08/07 08:00 | Lucas Miedler v Frederik Nielsen | 6-3,6-2 |
| Challenger Portoroz Qual | 2018/08/06 08:00 | Frederik Nielsen v Albano Olivetti | 6-2,7-6 |
| Challenger Portoroz Qual | 2018/08/05 08:00 | Andrea Pellegrino v Frederik Nielsen | 0-6,0-6 |
| Challenger Portoroz Qual | 2018/08/04 09:35 | Frederik Nielsen v Matic Dimic | 7-5,6-0 |
| Challenger Segovia Qual | 2018/07/29 14:30 | Karim-Mohamed Maamoun v Frederik Nielsen | 7-6,3-6,6-2 |
| Challenger Cary | 2018/09/10 18:00 | Alexander Sarkissian v Joris De Loore | 4-6,4-6 |
| Challenger Cary | 2018/09/09 14:00 | Alexander Sarkissian v Ronnie Schneider | 6-2,2-6,6-3 |
| Challenger Cary | 2018/09/08 15:20 | Alexander Sarkissian v Ruan Roelofse | 6-4,6-3 |
| Challenger Chicago | 2018/09/06 17:45 | Alexander Sarkissian v JC Aragone | 6-2,6-7,6-7 |
| Challenger Chicago | 2018/09/05 15:00 | Andreas Seppi v Alexander Sarkissian | 3-6,6-7 |
| Challenger Chicago | 2018/09/03 22:20 | Ruan Roelofse v Alexander Sarkissian | 3-6,4-6 |
| Challenger Chicago | 2018/09/02 21:35 | Aron Hiltzik v Alexander Sarkissian | 1-6,2-6 |
| Challenger Chicago | 2018/09/02 16:40 | Aleksandar Vukic v Alexander Sarkissian | 3-6,4-6 |