| ITF M25 Osijek | 2023/08/09 12:55 | Sebastian Sorger v Kekez, Duje | 0-6,6-4,6-2 |
| ITF M15 Novi Sad | 2023/08/04 08:00 | Dusan Obradovic v Kekez, Duje | 6-2,6-3 |
| ITF M15 Novi Sad | 2023/08/03 11:45 | Kekez, Duje v Nicolas Bruna | 6-4,7-5 |
| ITF M15 Novi Sad | 2023/08/02 09:25 | Kekez, Duje v Thiago Cigarran | 6-4,6-4 |
| ITF M15 Novi Sad | 2023/07/27 08:00 | Mili Poljicak v Kekez, Duje | 4-6,6-1,6-4 |
| ITF M15 Novi Sad | 2023/07/26 11:50 | Kekez, Duje v Erik Arutiunian | 7-6,6-4 |
| ITF M15 Store | 2023/06/21 08:15 | Kekez, Duje v Pietro Pampanin | 3-6,2-6 |
| Sarajevo, Singles Main, M-ITF-BIH-05A | 2023/06/06 11:00 | Kekez, Duje v Matej Dodig | 2-6,4-6 |
| ITF - M25 Santa Margherita | 2023/10/01 09:30 | Vitali Shvets v Heger, Tim | 6-1,7-6 |
| ITF - M25 Santa Margherita | 2023/09/24 08:00 | Galoppini, Davide v Heger, Tim | 6-1,6-3 |
| ITF - M25 Santa Margherita | 2023/09/18 08:30 | Dax Donders v Heger, Tim | 6-1,6-1 |
| ITF - M25 Santa Margherita | 2023/09/17 08:30 | Vitali Shvets v Heger, Tim | 1-6,2-6 |
| Maribor, Singles Main, M-ITF-SLO-06A | 2023/09/07 08:00 | Heger, Tim v Mathys Erhard | 3-6,4-6 |
| Maribor, Singles Main, M-ITF-SLO-06A | 2023/09/06 09:35 | Nikita Mashtakov v Heger, Tim | 6-4,4-6,1-6 |
| Maribor, Singles Main, M-ITF-SLO-06A | 2023/09/05 07:50 | Heger, Tim v Enrico Giacomini | 6-3,6-2 |
| Maribor, Singles Main, M-ITF-SLO-06A | 2023/09/04 08:00 | Heger, Tim v Lukas Rohseano | 6-2,6-2 |