| Qatar Open - Mixed dubbel | 2018/08/15 13:00 | Deni Kozul v Robin Devos | W | 4-1 |
| Tjeckien - Extraleague | 2018/08/14 05:30 | Samuel Kaluzny v Deni Kozul | L | 3-1 |
| Qatar Open - Mixed dubbel | 2018/05/29 06:10 | Pak Nam Ng v Deni Kozul | W | 1-4 |
| Qatar Open - Mixed dubbel | 2018/05/22 07:15 | Man Ho Kwan v Deni Kozul | W | 3-4 |
| Qatar Open - Damer | 2018/05/04 19:00 | Cristian Pletea v Deni Kozul | L | 3-0 |
| Qatar Open - Damer | 2018/05/04 17:00 | Ovidiu Ionescu v Deni Kozul | L | 3-0 |
| Qatar Open - Damer | 2018/05/03 18:00 | Deni Kozul v Pawel Fertikowski | W | 3-0 |
| Qatar Open - Damer | 2018/05/02 18:30 | Deni Kozul v Bastian Steger | W | 3-1 |
| Qatar Open - Mixed dubbel | 2018/08/14 07:25 | Yuki Matsuyama v Tomasz Kotowski | L | 4-1 |
| Tjeckien - Extraleague | 2018/08/14 06:05 | Haidong Xu v Tomasz Kotowski | L | 3-2 |
| Qatar Open - Damer | 2018/05/02 18:00 | Tomasz Kotowski v Quentin Robinot | L | 0-3 |
| Qatar Open - Mixed dubbel | 2018/04/03 07:00 | Tomasz Kotowski v Vsevolod Broiakovskyi | W | 3-2 |
| Qatar Open - Mixed dubbel | 2018/04/02 09:40 | Tomasz Kotowski v Yi-Hsin Feng | L | 0-4 |
| Qatar Open - Mixed dubbel | 2018/03/14 08:00 | Tomasz Kotowski v Sam Boccard | W | 3-1 |
| Qatar Open - Mixed dubbel | 2018/03/13 14:20 | Tomasz Kotowski v Tyrese Knight | W | 3-1 |
| Qatar Open - Mixed dubbel | 2017/10/28 14:00 | Tomasz Kotowski v Rares Sipos | L | 1-3 |