Stadium: Court 5 Round: 54 Ground: Clay
| Wels, Singles M-ITF-AUT-03A | 2019/07/24 14:25 | Szintai, David v Jirousek, Tomas | 6-7,1-6 |
| Wels, Singles M-ITF-AUT-03A | 2019/07/22 11:00 | Szintai, David v Lopez, Luis Humberto | 6-4,6-3 |
| Wels, Singles M-ITF-AUT-03A | 2019/07/22 07:30 | Szintai, David v Mrsic, Luka | 2-6,6-4,14-12 |
| Piestany, Singles M-ITF-SVK-02A | 2019/07/17 11:35 | Szintai, David v Fabian Marozsan | 3-6,3-6 |
| Piestany, Singles M-ITF-SVK-02A | 2019/07/16 07:00 | Szintai, David v Daniel Paty | 1-6,6-3,12-10 |
| Piestany, Singles M-ITF-SVK-02A | 2019/07/15 09:00 | Szintai, David v Voros, Mate | 6-3,6-2 |
| Balatonalmadi, Singles Qualifying M-ITF-HUN-02A | 2019/06/19 15:10 | Charles Broom v Szintai, David | 6-3,3-6,6-4 |
| Gyula, Singles M-ITF-HUN-01A | 2019/05/29 07:00 | Vit Kopriva v Szintai, David | 6-0,7-6 |
| Gyula, Singles M-ITF-HUN-01A | 2019/05/27 12:30 | Sallay, Peter v Martin Zeljenka | 6-2,6-2 |
| ITF M15 Brcko | 2019/05/21 11:00 | Wakita, Shunsuke v Martin Zeljenka | 6-3,6-1 |
| Piestany, Singles M-ITF-SVK-02A | 2019/05/06 08:00 | Noah Thurner v Martin Zeljenka | 6-3,6-4 |
| ITF Czech Republic F9 | 2018/11/04 15:00 | Martin Zeljenka v Wojnar, Bartosz | 6-7,4-6 |
| ITF Hungary F7 | 2018/08/29 12:55 | Martin Zeljenka v Wilson Leite | 1-6,4-6 |
| Hungary F6, Singles | 2018/08/21 12:50 | Kalenichenko, Danylo v Martin Zeljenka | 6-1,6-3 |
| Hungary F6, Singles | 2018/08/20 09:00 | Wojnar, Bartosz v Martin Zeljenka | 4-6,6-7 |
| ITF Slovakia F3 | 2018/08/07 08:00 | Martin Zeljenka v Jack Draper | 4-6,2-6 |