Stadium: Court 2 Round: 62 Ground: Clay
| ITF M15 Doboj | 2021/07/13 08:00 | Vladan Tadic v Marko Stakusic | 6-3,6-4 |
| ITF M15 Sarajevo | 2021/06/02 14:30 | Gauthier Onclin v Marko Stakusic | 6-1,6-1 |
| ITF M25 Kiseljak | 2021/05/25 12:55 | Gorazd Srbljak v Marko Stakusic | 4-6,6-3,6-2 |
| Challenger Granby | 2019/07/22 13:00 | Hunter Reese v Marko Stakusic | 6-4,7-5 |
| ITF Canada F7 | 2018/09/08 13:00 | Gabriel Diallo v Marko Stakusic | 6-2,6-4 |
| ITF M25 Kottingbrunn | 2021/07/18 07:30 | Nikolas Lahky v Samuel Puskar | 3-6,2-6 |
| ITF M15 Poprad | 2021/07/04 08:00 | Janos Fekete v Nikolas Lahky | 6-2,7-6 |
| ITF M25 Wroclaw | 2021/06/27 12:30 | Michal Novansky v Nikolas Lahky | 6-4,6-4 |
| ITF M15 Sarajevo | 2021/05/31 12:00 | Moritz Trocker v Nikolas Lahky | 6-2,6-1 |
| ITF M15 Sarajevo | 2021/05/30 10:30 | Nikolas Lahky v Petar Pjevcevic | 6-3,7-5 |
| ITF M15 Bucharest | 2021/05/23 08:30 | Nikolas Lahky v Filippo Speziali | 3-6,3-6 |
| ITF M15 Sibenik | 2021/04/18 08:00 | Nikolas Lahky v Mayeul Darras | 5-7,7-6,4-10 |
| ITF M15 Opatija | 2021/03/21 08:00 | Aleksandre Bakshi v Nikolas Lahky | 7-6,6-2 |