| WTT Contender Lasko | 11/03 12:40 | - | Steffen Mengel v Eric Jouti | W | 3-0 | |
| WTT Contender Lasko | 11/02 18:45 | - | Steffen Mengel v Snehit Suravajjula | W | 3-0 | |
| WTT Contender Lasko | 11/02 12:05 | - | Steffen Mengel v Pedro Osiro | W | 3-0 | |
| Európa Kupa | 05/15 09:20 | 1 | Patrick Baum v Steffen Mengel | L | 3-2 | |
| Európa Kupa | 05/14 17:05 | 1 | Zsolt Peto v Steffen Mengel | W | 1-3 | |
| Európa Kupa | 05/13 08:25 | 1 | Steffen Mengel v Miho Simovic | W | 3-1 | |
| Európa Kupa | 05/12 12:45 | 1 | Steffen Mengel v Marc Duran | W | 3-1 | |
| Európa Kupa | 05/12 11:35 | 1 | Steffen Mengel v Joan Masip | W | 3-1 | |
| Bajnokok Ligája | 12/13 13:10 | - | Steffen Mengel v Milosz Redzimski | W | 3-0 | |
| Bajnokok Ligája | 12/12 12:30 | - | Oriol Monzo v Steffen Mengel | W | 0-3 | |
| Bajnokok Ligája | 12/11 13:25 | - | Alexei Liventsov v Steffen Mengel | W | 2-3 | |
| Dusseldorf Masters | 08/23 12:00 | - | Dang Qiu v Steffen Mengel | L | 4-1 | |
| Dusseldorf Masters | 08/23 09:50 | - | Steffen Mengel v Anton Kallberg | W | 4-0 | |
| Dusseldorf Masters | 08/21 17:45 | - | Omar Assar v Steffen Mengel | W | 0-4 | |
| Dusseldorf Masters | 08/16 08:00 | - | Benedikt Duda v Steffen Mengel | L | 4-3 | |
| Dusseldorf Masters | 08/15 08:45 | - | Steffen Mengel v Gerrit Engemann | W | 4-2 | |
| Dusseldorf Masters | 08/14 15:20 | - | Steffen Mengel v Kay Stumper | W | 4-0 | |
| Cseh Liga Pro | 08/08 10:15 | - | Benedikt Duda v Steffen Mengel | L | 4-2 | |
| Dusseldorf Masters | 08/07 17:20 | - | Steffen Mengel v Fanbo Meng | W | 4-1 | |
| Dusseldorf Masters | 07/24 08:00 | - | Steffen Mengel v Anton Kallberg | L | 2-4 | |
| Dusseldorf Masters | 07/23 14:40 | - | Steffen Mengel v Tobias Slanina | W | 4-1 | |
| Dusseldorf Masters | 07/23 14:40 | - | Steffen Mengel v Dennis Klein | D |
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| Dusseldorf Masters | 06/25 09:00 | - | Dang Qiu v Steffen Mengel | L | 4-2 | |
| Dusseldorf Masters | 06/23 10:05 | - | Omar Assar v Steffen Mengel | W | 0-4 | |
| Dusseldorf Masters | 06/23 07:30 | - | Steffen Mengel v Kirill Fadeev | W | 4-0 | |
| Dusseldorf Masters | 06/09 09:15 | - | Steffen Mengel v Kanak Jha | L | 2-3 | |
| Dusseldorf Masters | 06/08 10:00 | - | Steffen Mengel v Kay Stumper | W | 3-0 | |
| Hungarian Open | 02/18 15:30 | - | Steffen Mengel v Tristan Flore | L | 2-4 | |
| Európa Bajnokok Ligája | 02/14 18:40 | 3 | Patrick Franziska v Steffen Mengel | W | 1-3 | |
| Európa Bajnokok Ligája | 02/14 18:00 | 3 | Kun Shang v Steffen Mengel | L | 3-0 |