Stadium: Court 4 Round: 62 Ground: Clay
| ITF M25 Belgrade | 2021/06/29 07:00 | Bogdan Pavel v Martin Zeljenka | 6-1,6-3 |
| ITF M25 Belgrade | 2021/06/28 10:00 | Martin Zeljenka v Minin, Matvey | 7-5,6-3 |
| ITF M25 Belgrade | 2021/06/27 12:00 | Martin Zeljenka v George Gregoriou | 6-1,6-1 |
| Sibenik, Singles M-ITF-CRO-05A | 2021/05/17 11:00 | Martin Zeljenka v Breysach , Martin | 6-7,3-6 |
| Sibenik, Singles M-ITF-CRO-05A | 2021/05/16 07:30 | Hoogland, Joris v Martin Zeljenka | 6-7,3-6 |
| ITF - M15 Prijedor | 2021/05/09 09:30 | Kristijan Juhas v Martin Zeljenka | 6-1,6-1 |
| Sibenik, Singles M-ITF-CRO-05A | 2021/04/19 12:20 | Gorazd Srbljak v Martin Zeljenka | 6-0,6-2 |
| Sibenik, Singles M-ITF-CRO-05A | 2021/04/18 10:00 | Martin Zeljenka v Arh, Anze | 7-5,1-6,10-3 |
| Sibenik, Singles M-ITF-CRO-05A | 2021/05/16 10:00 | Kis Balazs, Rafael v Breysach , Martin | 0-6,4-6 |
| ITF M15 Anif | 2020/08/23 07:00 | Kis Balazs, Rafael v Filip, Vladimir | 3-6,4-6 |
| Vogau, Singles Qualifying M-ITF-AUT-04A | 2020/08/16 09:30 | Timofey Skatov v Kis Balazs, Rafael | 6-0,6-2 |
| ITF - M15 Manacor | 2020/01/05 10:30 | Adrian Bodmer v Kis Balazs, Rafael | 6-1,6-0 |
| ITF Hungary F2 Qual | 2018/05/12 08:00 | Kis Balazs, Rafael v Maruscak, Matej | 1-6,4-6 |
| ITF Hungary F1 Qual | 2018/05/07 10:30 | Turcu, Mihnea Lorin Stefan v Kis Balazs, Rafael | 6-1,6-3 |
| ITF Hungary F1 Qual | 2018/05/05 08:00 | Kis Balazs, Rafael v Angerbauer, Matthias | 7-5,6-1 |
| ITF Hungary F3 Qual | 2017/05/21 08:00 | Fekiac, Martin v Kis Balazs, Rafael | 6-1,6-1 |