Stadium: Court 5 Round: 25 Ground: Clay
| ITF Czech Republic F4 Qual | 2017/07/03 10:30 | Marek Semjan v Zdenek Derkas | 6-2,1-6,7-6 |
| ITF M15 Telfs | 2019/07/10 08:00 | Marek Semjan v Lenny Hampel | 1-6,3-6 |
| ITF M15 Balatonalmadi | 2019/06/19 09:50 | Gabor Borsos v Marek Semjan | 6-3,6-3 |
| ITF M15 Balatonalmadi | 2019/06/18 08:00 | Joao Lucas Reis da Silva v Marek Semjan | 3-6,4-6 |
| ITF M15 Balatonalmadi | 2019/06/17 09:00 | Matthew Dellavedova v Marek Semjan | 5-7,1-6 |
| ITF M25 Gyula | 2019/05/30 08:00 | Marek Semjan v Fabrizio Ornago | 2-6,3-6 |
| ITF M25 Gyula | 2019/05/29 09:00 | Martins Rocens v Marek Semjan | 6-7,1-6 |
| ITF M15 Brcko | 2019/05/22 07:00 | Marek Semjan v Gonzalo Villanueva | 3-6,3-6 |
| ITF M15 Piestany | 2019/05/08 11:25 | Marek Semjan v Artem Dubrivnyy | 3-6,5-7 |
| ITF M15 Piestany | 2019/07/16 07:00 | Zdenek Derkas v Jim Walder | 7-5,6-1 |
| ITF M15 Piestany | 2019/07/15 07:00 | Roman Boychuk v Zdenek Derkas | 6-7,3-6 |
| ITF M25 Most | 2019/05/29 11:35 | Tadeas Paroulek v Zdenek Derkas | 6-1,6-2 |
| ITF M25 Most | 2019/05/28 12:00 | Vitek Horak v Zdenek Derkas | 2-6,1-6 |
| ITF M25 Jablonec Nad Nisou | 2019/05/20 10:30 | Zdenek Derkas v Bruno Santanna | 2-6,1-6 |
| ITF M25 Bakersfield | 2019/03/13 22:30 | Zdenek Derkas v Tom Fawcett | 2-6,6-3,4-6 |
| ITF M25 Bakersfield | 2019/03/12 18:30 | Zdenek Derkas v Ronald Hohmann | 7-6,6-3 |
| ITF Czech Republic F5 Qual | 2018/07/01 08:00 | Roman Boychuk v Zdenek Derkas | 6-1,6-3 |