| Ligue des Champions | 12/19 17:20 | - | Jonathan Groth v Alexander Gillen | L | 3-0 | |
| Ligue des Champions | 12/19 16:25 | - | Kaii Konishi v Alexander Gillen | L | 3-0 | |
| Ligue des Champions | 12/08 19:50 | - | Alexander Gillen v Kaii Konishi | L | 0-3 | |
| Ligue des Champions | 11/26 14:00 | - | Ueda, Jin v Sasha Alexander Gillen | L | 3-0 | |
| Europe Cup | 10/22 17:40 | - | Alexander Gillen v Frane Kojic | L | 0-3 | |
| Europe Cup | 10/22 15:50 | - | Alexander Gillen v Ueda, Jin | L | 0-3 | |
| WTT Feeder Stockholm Quals | 10/02 09:00 | 6 | Alexander Gillen v Federico Otalvaro | L | 1-3 | |
| WTT Feeder Olomouc Quals 2023 | 08/22 15:15 | - | Alexander Gillen v Nemanja Dilas | L | 0-3 | |
| Ligue des Champions | 12/18 12:55 | - | Sasha Alexander Gillen v Andreas Levenko | L | 0-3 | |
| ITTF European Team Championships, Singles | 08/29 08:00 | 3 | Alexander Gillen v Tauber, Michael | L | 0-3 | |
| ITTF European Team Championships, Singles | 08/27 18:30 | - | Gabrielius Camara v Alexander Gillen | L | 3-1 | |
| European Team Championships | 08/27 12:45 | - | Lesiv, Rimas v Alexander Gillen | W | 1-3 |