Stadium: Opatija 1 Round: 62 Ground: Clay
| Challenger Szekesfehervar | 2023/03/12 09:00 | Benjamin Hassan v Martin Zeljenka | 6-1,7-6 |
| ITF M15 Porec | 2023/03/05 09:00 | Martin Zeljenka v Igor Dudun | 1-6,2-6 |
| ITF M25 Trnava | 2022/11/28 09:00 | Coleman Wong v Martin Zeljenka | 6-1,6-2 |
| ITF M15 Zlatibor | 2022/09/15 10:10 | Duje Kekez v Martin Zeljenka | 6-3,6-4 |
| ITF M15 Zlatibor | 2022/09/14 11:05 | Tilen Kovac v Martin Zeljenka | 0-6,1-6 |
| ITF M15 Zlatibor | 2022/09/13 08:00 | Martin Zeljenka v Gheorghe Claudiu Schinteie | 7-6,6-7,10-7 |
| ITF M15 Zlatibor | 2022/09/12 08:00 | Matija Zugic v Martin Zeljenka | 1-6,4-6 |
| ITF M15 Zlatibor | 2022/09/11 08:30 | Dimitrije Kocic v Martin Zeljenka | 4-6,4-6 |
| ITF M15 Rovinj | 2023/03/12 09:00 | Drazen Petrovic v Marko Andrejic | 6-3,3-6,10-6 |
| ITF M25 Pardubice | 2022/09/20 09:50 | Marko Andrejic v Yvo Panak | 3-6,6-3,7-10 |
| ITF M25 Pardubice | 2022/09/19 08:00 | Marko Andrejic v Jimmy Yang | 7-5,6-4 |
| ITF M25 Pardubice | 2022/09/18 08:00 | Marko Andrejic v Peter Kucera | 6-3,6-1 |
| Challenger Tulln | 2022/09/05 09:50 | Marko Andrejic v Lukas Klein | 5-7,4-6 |
| Challenger Tulln | 2022/09/04 11:45 | Juan Bautista Torres v Marko Andrejic | 2-6,5-7 |
| ITF M15 Bad Waltersdorf | 2022/08/25 10:50 | Pavel Shumeiko v Marko Andrejic | 6-7,2-6 |
| ITF M15 Bad Waltersdorf | 2022/08/24 07:00 | Marko Andrejic v David Pichler | 6-3,6-3 |