| Qatar Open – SP | 2017/11/23 13:00 | Carlos Franco v David Valenzuela | L | 4-1 |
| Challenger Ochsenhausen | 2018/08/31 08:30 | Yannick Vostes v Aleksa Gacev | L | 3-2 |
| Challenger Ochsenhausen | 2018/08/30 12:30 | Daniel Kiss v Aleksa Gacev | L | 3-2 |
| Challenger Ochsenhausen | 2018/08/30 09:50 | Peter Musko v Aleksa Gacev | L | 3-0 |
| Challenger Ochsenhausen | 2018/08/30 07:50 | Tristan Flore v Aleksa Gacev | L | 3-0 |
| Challenger Ochsenhausen | 2018/08/29 12:30 | Lehel Demeter v Aleksa Gacev | L | 3-1 |
| Challenger Ochsenhausen | 2018/08/29 11:10 | Josip Huzjak v Aleksa Gacev | L | 3-0 |
| Challenger Ochsenhausen | 2018/08/29 06:30 | Eduardo Gonzales v Aleksa Gacev | W | 1-3 |
| Challenger Ochsenhausen | 2018/08/28 11:40 | Aleksa Gacev v Daniel Kleinert | L | 0-3 |