Stadium: Court 4 Round: 25 Ground: Hardcourt indoor
| Challenger Houston | 2018/11/17 17:45 | Dominik Koepfer v Bradley Klahn | 3-6,4-6 |
| Challenger Houston | 2018/11/16 17:30 | Dominik Koepfer v Ivo Karlovic | 6-1,6-4 |
| Challenger Houston | 2018/11/14 20:50 | Dominik Koepfer v Ernesto Escobedo | 6-1,7-5 |
| Challenger Houston | 2018/11/12 18:30 | Dominik Koepfer v Marcelo Arevalo | 7-6,3-6,6-4 |
| Challenger Knoxville | 2018/11/08 15:00 | Tim Smyczek v Dominik Koepfer | 6-4,7-6 |
| Challenger Knoxville | 2018/11/06 18:10 | Dominik Koepfer v Mitchell Krueger | 6-1,2-6,6-2 |
| Challenger Charlottesville | 2018/10/29 21:05 | Tobias Kamke v Dominik Koepfer | 6-1,3-6,6-1 |
| Challenger Las Vegas | 2018/10/22 20:10 | Darian King v Dominik Koepfer | 6-4,6-4 |
| Challenger Andria | 2018/11/18 14:15 | Tobias Simon v Borna Gojo | 7-6,6-4 |
| Challenger Bratislava | 2018/11/03 12:15 | Alexander Bublik v Borna Gojo | 6-2,4-6,6-4 |
| Challenger Eckental | 2018/10/30 10:00 | Daniel Masur v Borna Gojo | 6-3,6-0 |
| Challenger Eckental | 2018/10/29 10:50 | Albano Olivetti v Borna Gojo | 4-6,7-6,6-4 |
| Challenger Eckental | 2018/10/28 14:45 | Corentin Denolly v Borna Gojo | 7-6,3-6,4-6 |
| Challenger Eckental | 2018/10/27 18:05 | Borna Gojo v Alexandre Muller | 6-3,6-4 |
| Challenger Calgary | 2018/10/20 19:25 | Borna Gojo v Ivo Karlovic | 6-7,6-7 |
| Challenger Calgary | 2018/10/19 18:00 | Filip Peliwo v Borna Gojo | 0-6,3-6 |