Stadium: Court Central Round: 24 Ground: Hardcourt indoor
| ITF Portugal F22 | 2018/10/27 14:15 | Gijs Brouwer v Fred Gil | 3-6,4-6 |
| ITF Portugal F22 | 2018/10/27 10:00 | Miguel Semmler v Gijs Brouwer | 6-4,3-6,1-6 |
| ITF Portugal F22 | 2018/10/25 09:00 | Matvey Minin v Gijs Brouwer | 2-6,3-6 |
| ITF Portugal F22 | 2018/10/23 14:20 | Maksim Tikhomirov v Gijs Brouwer | 2-6,1-6 |
| ITF France F22 | 2018/10/19 10:35 | Gijs Brouwer v Matteo Martineau | 3-6,4-6 |
| ITF France F22 | 2018/10/18 11:30 | Gijs Brouwer v Nicolas Tepmahc | 6-2,6-0 |
| ITF Spain F29 | 2018/09/25 10:00 | Gijs Brouwer v Hugo Gaston | 2-6,3-6 |
| ITF Italy F28 | 2018/09/18 12:00 | Gijs Brouwer v Gibril Diarra | 6-7,2-6 |
| Challenger Charlottesville | 2018/10/28 16:00 | Petros Chrysochos v Stefan Kozlov | 1-6,6-3,6-2 |
| Challenger Charlottesville | 2018/10/27 16:10 | Emil Reinberg v Stefan Kozlov | 6-3,6-7,1-6 |
| Challenger Las Vegas | 2018/10/23 18:00 | Kamil Majchrzak v Stefan Kozlov | 6-0,6-2 |
| Challenger Calgary | 2018/10/15 20:30 | Stefan Kozlov v Jan Choinski | 3-6,3-6 |
| Challenger Monterrey | 2018/10/01 21:25 | Stefan Kozlov v Lucas Gomez | 2-6,4-6 |
| Challenger Aptos | 2018/08/06 18:00 | Stefan Kozlov v Kaichi Uchida | 4-6,1-6 |
| ATP Washington Qual | 2018/07/28 14:00 | Jared Hiltzik v Stefan Kozlov | 6-3,6-3 |
| Wimbledon Qual | 2018/06/26 14:50 | Stefan Kozlov v Yannick Maden | 1-6,3-6 |