| ITF M15 Sarajevo | 2021/06/03 09:00 | Skander Mansouri v Duje Kekez | 7-5,6-4 |
| ITF M15 Sarajevo | 2021/06/02 09:00 | Duje Kekez v Sebastian Prechtel | 6-1,6-1 |
| ITF M25 Kiseljak | 2021/05/25 13:05 | Sebastian Prechtel v Duje Kekez | 3-6,6-3,6-4 |
| ITF M15 Sibenik | 2021/05/19 17:55 | Duje Kekez v Dan Added | 0-6,0-6 |
| ITF M15 Sibenik | 2021/05/18 08:30 | Duje Kekez v Julien Penzlin | 6-3,6-2 |
| ITF M15 Sibenik | 2021/05/17 10:25 | Duje Kekez v Admir Kalender | 6-4,0-6,10-8 |
| ITF M15 Sibenik | 2021/05/16 10:00 | Duje Kekez v Matic Dimic | 6-2,6-0 |
| ITF M15 Prijedor | 2021/05/11 09:50 | Duje Kekez v Federico Campana | 4-6,6-0,7-10 |