Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| Challenger Las Vegas | 2018/10/23 18:00 | Alexander Sarkissian v Jason Jung | 6-7,4-6 |
| Challenger Las Vegas | 2018/10/22 18:00 | Tommy Paul v Alexander Sarkissian | 6-3,6-3 |
| Challenger Las Vegas | 2018/10/21 19:15 | Lloyd Glasspool v Alexander Sarkissian | 4-6,4-6 |
| Challenger Las Vegas | 2018/10/20 22:05 | Trevor A Johnson v Alexander Sarkissian | 4-6,2-6 |
| Challenger Fairfield | 2018/10/07 17:00 | Alexander Sarkissian v Tommy Paul | 5-7,2-6 |
| Challenger Fairfield | 2018/10/06 18:55 | Alexander Sarkissian v Zsombor Piros | 6-4,6-2 |
| Challenger Stockton | 2018/10/04 16:30 | Alexander Sarkissian v Maxime Janvier | 6-7,0-6 |
| Challenger Stockton | 2018/10/02 17:00 | Alexander Sarkissian v Maverick Banes | 6-4,6-7,6-1 |
| Challenger Knoxville | 2018/11/08 16:55 | Evgeny Karlovskiy v Bradley Klahn | 5-7,6-4,6-4 |
| Challenger Knoxville | 2018/11/06 20:50 | JC Aragone v Bradley Klahn | 2-6,6-7 |
| Challenger Charlottesville | 2018/11/03 18:40 | Bradley Klahn v Tommy Paul | 3-6,3-6 |
| Challenger Charlottesville | 2018/11/02 20:50 | Bradley Klahn v Bjorn Fratangelo | 6-3,6-3 |
| Challenger Charlottesville | 2018/10/31 23:35 | Bradley Klahn v James Ward | 6-1,6-2 |
| Challenger Charlottesville | 2018/10/30 16:40 | Bradley Klahn v Denis Yevseyev | 6-3,2-6,6-3 |
| ATP Vienna | 2018/10/20 09:00 | Sergiy Stakhovsky v Bradley Klahn | 6-7,6-4,6-4 |
| ATP Stockholm | 2018/10/18 17:30 | John Isner v Bradley Klahn | 7-6,6-7,7-6 |