Stadium: Court 2 Round: 25 Ground: Clay
| ITF M15 - Ulcinj | 2021/08/30 11:30 | Aristotelis Thanos v Aleksandar Tomas | 5-7,2-6 |
| ITF M15 - Ulcinj | 2021/08/30 07:30 | Aristotelis Thanos v Danilo Raicevic | 6-2,6-1 |
| ITF M25 - Poznan | 2021/08/25 13:10 | Aristotelis Thanos v Martins Podzus | 2-6,3-6 |
| ITF M25 - Poznan | 2021/08/24 13:10 | Aristotelis Thanos v Valerio Aboian | 6-7,1-6 |
| ITF M25 - Poznan | 2021/08/22 08:00 | Aristotelis Thanos v Peter Samosi | 6-1,6-2 |
| ITF M15 - Lodz | 2021/08/18 11:25 | Aristotelis Thanos v Gilbert S K Junior | 2-6,3-6 |
| ITF M15 - Lodz | 2021/08/17 08:00 | Aristotelis Thanos v Thijmen Loof | 6-1,6-3 |
| ITF M15 - Lodz | 2021/08/16 09:30 | Aristotelis Thanos v Dmitrii Vasilev | 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 - 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 |