Stadium: CENTER COURT (7) Round: 25 Ground: Clay
| ITF M15 Ulcinj | 2021/08/31 08:00 | Oleksandr Ovcharenko v Gorazd Srbljak | 5-7,4-6 |
| Challenger Barletta | 2021/08/22 10:00 | Aidan Mchugh v Oleksandr Ovcharenko | 6-2,6-4 |
| ITF M15 Pescara | 2021/08/18 08:30 | Giorgio Tabacco v Oleksandr Ovcharenko | 6-4,3-6,6-1 |
| ITF M15 Cairo | 2021/08/06 08:00 | Juan Bautista Torres v Oleksandr Ovcharenko | 6-4,6-2 |
| ITF M15 Cairo | 2021/08/05 09:40 | Mathys Erhard v Oleksandr Ovcharenko | 4-6,1-6 |
| ITF M15 Cairo | 2021/08/04 10:00 | Oleksandr Ovcharenko v Mathieu Perchicot | 7-6,6-2 |
| ITF M15 Cairo | 2021/07/28 08:00 | Mathieu Perchicot v Oleksandr Ovcharenko | 6-3,1-6,6-2 |
| ITF M15 Cairo | 2021/07/24 08:00 | Oleksandr Ovcharenko v Jose Fco. Vidal Azorin | 6-7,1-6 |
| ITF M15 Ulcinj | 2021/09/01 10:00 | Aristotelis Thanos v Duje Kekez | 2-6,7-6,6-0 |
| ITF M15 Novi Sad | 2021/08/03 12:40 | Pedro Boscardin Dias v Duje Kekez | 7-6,6-3 |
| ITF M15 Novi Sad | 2021/07/29 12:40 | Duje Kekez v Filip Misolic | 4-6,0-6 |
| ITF M15 Novi Sad | 2021/07/28 07:25 | Wilson Leite v Duje Kekez | 2-6,3-6 |
| ITF M15 Doboj | 2021/07/15 10:40 | Andrej Nedic v Duje Kekez | 0-6,2-6 |
| ITF M15 Doboj | 2021/07/14 08:30 | Duje Kekez v Aldin Setkic | 7-5,7-6 |
| ITF M25 Velenje | 2021/07/07 08:00 | Toby Alex Kodat v Duje Kekez | 3-6,6-1,7-5 |
| ITF M15 Szarajevó | 2021/06/03 09:00 | Skander Mansouri v Duje Kekez | 7-5,6-4 |