Stadium: National Bank Court Round: 25 Ground: Hardcourt indoor
| 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 |
| Wimbledon Qual | 2018/06/25 14:05 | Dustin Brown v Stefan Kozlov | 3-6,1-6 |
| Challenger Ilkley Qual | 2018/06/17 11:35 | Brydan Klein v Stefan Kozlov | 4-6,6-1,7-5 |
| Challenger Nottingham | 2018/06/12 10:00 | Stefan Kozlov v Christopher Eubanks | 3-6,3-6 |
| Challenger Surbiton Qual | 2018/06/02 13:55 | Stefan Kozlov v Daniel Evans | 1-6,0-6 |
| Challenger Vicenza Qual | 2018/05/27 10:50 | Stefan Kozlov v Martin Cuevas | 4-6,1-6 |
| ITF Belgium F9 | 2018/08/26 13:00 | Jan Choinski v Colin Sinclair | 3-6,7-6,6-3 |
| ITF Belgium F9 | 2018/08/25 12:00 | Jan Choinski v Samuel Brosset | 6-3,6-3 |
| ITF Belgium F9 | 2018/08/24 12:00 | Jan Choinski v Dan Added | 6-3,6-0 |
| ITF Belgium F9 | 2018/08/22 13:00 | Jan Choinski v Nikolas Sanchez Izquierdo | 6-3,6-3 |
| ITF Belgium F9 | 2018/08/21 10:30 | Jan Choinski v Felipe M Sarrasague | 6-2,6-0 |
| Challenger Meerbusch | 2018/08/19 12:30 | Jan Choinski v Filip Horansky | 7-6,3-6,3-6 |
| Challenger Meerbusch | 2018/08/18 11:30 | Jan Choinski v Dustin Brown | 6-4,6-3 |
| Challenger Meerbusch | 2018/08/17 11:00 | Jan Choinski v Bernabe Zapata Miralles | 5-7,6-2,6-1 |