| UTR Pro Tennis Series Zadar | 2021/09/29 08:00 | Kekez, Duje v Keisidis, Christos | 6-2,2-6,5-6 |
| UTR Pro Tennis Series Zadar | 2021/09/28 12:30 | Kekez, Duje v Stefanos Sakellaridis | 7-6,6-3 |
| UTR Pro Tennis Series Zadar | 2021/09/27 11:30 | Kekez, Duje v Janos Fekete | 3-6,5-6 |
| ITF M15 Ulcinj | 2021/09/22 09:25 | Kekez, Duje v Felix Gill | 6-7,6-7 |
| ITF M15 Ulcinj | 2021/09/15 07:55 | Kekez, Duje v Timo Legout | 4-6,4-6 |
| ITF M15 Ulcinj | 2021/09/07 10:10 | Oleksandr Ovcharenko v Kekez, Duje | 6-1,4-6,6-4 |
| ITF M15 Ulcinj | 2021/09/01 10:00 | Aristotelis Thanos v Kekez, Duje | 2-6,7-6,6-0 |
| ITF M15 Novi Sad | 2021/08/03 12:40 | Pedro Boscardin Dias v Kekez, Duje | 7-6,6-3 |
| UTR Pro Tennis Series Zadar | 2021/09/29 08:00 | Janos Fekete v Drazen Petrovic | 4-6,6-4,1-6 |
| UTR Pro Tennis Series Zadar | 2021/09/27 11:30 | Stefanos Sakellaridis v Drazen Petrovic | 7-6,2-6,5-2 |
| ITF M15 Ulcinj | 2021/09/19 08:00 | Drazen Petrovic v Eminefendic, Ervin Haris | 3-6,7-6,6-10 |
| ITF M15 Ulcinj | 2021/09/14 07:55 | Drazen Petrovic v Kawakami, Rimpei | 1-6,3-6 |
| Challenger Banja Luka | 2021/09/06 14:30 | Drazen Petrovic v Gomez-Herrera, Carlos | 1-6,0-6 |
| ITF M15 Novi Sad | 2021/08/03 09:40 | Tomas, Aleksandar v Drazen Petrovic | 6-7,6-0,10-8 |
| ITF M15 Novi Sad | 2021/08/02 08:00 | Drazen Petrovic v Jandric, Darko | 6-4,6-0 |
| ITF M15 Novi Sad | 2021/08/01 08:30 | Drazen Petrovic v Vukovic, Milos | 6-4,6-2 |