| WTT Feeder Dusseldorf III Quals | 2023/11/27 19:20 | Dimitrije Levajac v Aleksa Gacev | W | 0-3 |
| European Team Championships | 2023/09/10 14:20 | Alexis Lebrun v Aleksa Gacev | L | 3-0 |
| WTT Contender Zagreb Quals | 2023/06/26 17:25 | Benedek Olah v Aleksa Gacev | L | 3-0 |
| WTT Contender Zagreb Quals | 2023/06/26 11:00 | Aleksa Gacev v Gustavo Gomez | W | 3-2 |
| WTT Feeder Dusseldorf | 2022/11/22 10:55 | Aleksa Gacev v Yan-Cheng Huang | L | 1-2 |
| WTT Contender Zagreb Quals | 2022/06/13 09:15 | Guodong Liang v Aleksa Gacev | L | 3-0 |
| WTT Feeder Dusseldorf | 2022/01/13 11:30 | Kilian Ort v Aleksa Gacev | L | 4-0 |
| WTT Feeder Dusseldorf | 2022/01/12 12:15 | Tarek Al Samhoury v Aleksa Gacev | W | 2-3 |
| WTT Feeder Dusseldorf III Quals | 2023/11/27 19:05 | Daniels Kogans v Luka Mladenovic | W | 1-3 |
| WTT Feeder Gaia | 2023/11/23 11:55 | Lilian Bardet v Luka Mladenovic | L | 3-1 |
| WTT Feeder Otocec | 2023/11/03 11:25 | Kai Zhou v Luka Mladenovic | L | 3-2 |
| WTT Feeder Otocec | 2023/11/02 15:40 | Luka Mladenovic v Haidong Xu | W | 3-0 |
| WTT Feeder Panagyurishte | 2023/08/31 14:40 | Luka Mladenovic v Andreas Levenko | L | 1-3 |
| WTT Feeder Olomouc Quals 2023 | 2023/08/23 13:05 | Luka Mladenovic v Dimitrije Levajac | L | 0-3 |
| WTT Feeder Olomouc Quals 2023 | 2023/08/23 09:15 | Luka Mladenovic v Hunor Szocs | W | 3-2 |
| WTT Feeder Havirov | 2023/07/29 17:20 | Luka Mladenovic v Simon Gauzy | L | 0-3 |