Stadium: Court 6 Round: 54 Ground: Clay
| ITF - M25 Vogau | 2019/08/05 11:00 | Roko Horvat v Deni Zmak | 1-6,3-6 |
| ITF M15 Telfs | 2019/07/09 09:00 | Mick Veldheer v Roko Horvat | 6-1,7-5 |
| ITF - M15 Belgrade | 2019/07/03 09:55 | Roko Horvat v Ljubomir Celebic | 2-6,3-6 |
| ITF - M15 Opatija | 2019/03/27 11:30 | Goran Markovic v Roko Horvat | 2-6,6-3,7-5 |
| ITF - M15 Rovinj | 2019/03/20 10:30 | Andrea Basso v Roko Horvat | 6-0,6-3 |
| ITF - M15 Porec | 2019/03/12 11:05 | Duje Kekez v Roko Horvat | 3-6,7-6,7-6 |
| ITF Croatia F2 | 2018/03/10 08:00 | Leopold Zima v Roko Horvat | 6-3,6-1 |
| ITF Croatia F1 | 2018/03/08 09:00 | Roko Horvat v Mate Delic | 1-6,3-6 |
| ITF M15 Targu Mures | 2019/08/06 08:00 | Martin Zeljenka v Gilad Tamar | 6-7,6-2,7-10 |
| ITF - M15 Novi Sad | 2019/07/29 08:00 | David Szintai v Martin Zeljenka | 6-2,6-1 |
| ITF M25 Gyula | 2019/05/27 12:30 | Peter Sallay v Martin Zeljenka | 6-2,6-2 |
| ITF - M15 Brcko | 2019/05/21 11:00 | Shunsuke Wakita v Martin Zeljenka | 6-3,6-1 |
| ITF M15 Piestany | 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 Bartosz Wojnar | 6-7,4-6 |
| ITF Hungary F7 | 2018/08/29 12:55 | Martin Zeljenka v Wilson Leite | 1-6,4-6 |
| ITF Hungary F6 | 2018/08/21 12:50 | Danylo Kalenichenko v Martin Zeljenka | 6-1,6-3 |