| Syed Modi Int. MD | 11/29 08:30 | 3 | Lamsfuss/Seidel v Di / Wang | L | 0-2 | |
| Syed Modi Int. MD | 11/28 08:25 | 4 | Na S S / Wang C v Lamsfuss/Seidel | W | 1-2 | |
| Syed Modi Int. MD | 11/27 09:20 | 5 | Arjun / Kapila v Lamsfuss/Seidel | W | 1-2 | |
| Hong Kong Open 2019, MD | 11/13 07:55 | 5 | Lamsfuss/Seidel v Astrup/Rasmussen | L | 1-2 | |
| Fuzhou China Open 2019, MD | 11/08 04:40 | 3 | Gideon M F / Sukamuljo K S v Lamsfuss/Seidel | L | 2-0 | |
| Fuzhou China Open 2019, MD | 11/07 03:00 | 4 | Han / Zhou v Lamsfuss/Seidel | W | 0-2 | |
| Fuzhou China Open 2019, MD | 11/05 05:30 | 5 | Lamsfuss M / Seidel M E v Lee/Yang | W | 2-1 | |
| Open de France - Doubles Hommes | 10/22 11:20 | 5 | Han / Zhou v Lamsfuss/Seidel | L | 2-1 | |
| Denmark Open MD | 10/17 11:30 | 4 | Lamsfuss/Seidel v Endo H / Watanabe Y | L | 1-2 | |
| Denmark Open MD | 10/16 15:00 | 5 | Lamsfuss/Seidel v Inoue T / Kaneko Y | W | 2-0 | |
| Dutch Open MD | 10/13 12:30 | 1 | Ivanov V / Sozonov I v Lamsfuss/Seidel | L | 2-0 | |
| Dutch Open MD | 10/12 15:30 | 2 | Lamsfuss/Seidel v Ou X Y / Zhang N | W | 2-1 | |
| Dutch Open MD | 10/11 17:10 | 3 | Maas J / Tabeling R v Lamsfuss/Seidel | W | 0-2 | |
| Dutch Open MD | 10/10 16:25 | 4 | Bay-Smidt M / Moelhede L v Lamsfuss/Seidel | W | 0-2 | |
| Dutch Open MD | 10/09 10:35 | 5 | Geiss B / Volker J C v Lamsfuss/Seidel | W | 0-2 | |
| Fuzhou China Open 2019, MD | 09/18 10:15 | 5 | Lamsfuss M / Seidel M E v Inoue T / Kaneko Y | L | 0-2 | |
| Vietnam Open MD | 09/12 09:20 | 4 | Na S S / Wang C v Lamsfuss/Seidel | L | 2-1 | |
| Vietnam Open MD | 09/11 13:50 | 5 | Chang / Lu v Lamsfuss/Seidel | W | 1-2 | |
| World Championships MD | 08/22 14:00 | 4 | Liu/Zhang v Lamsfuss/Seidel | L | 2-0 | |
| World Championships MD | 08/21 10:20 | 5 | Lamsfuss/Seidel v Endo H / Watanabe Y | W | 2-1 | |
| World Championships MD | 08/20 14:00 | 6 | Lamsfuss/Seidel v Chrisnanta D B / Loh K H | W | 2-1 | |
| Thailand Open MD | 07/30 10:55 | 5 | Han / Zhou v Lamsfuss/Seidel | L | 2-1 | |
| Japan Open MD | 07/24 07:00 | 5 | Lamsfuss M / Seidel M E v Ahsan/Setiawan | L | 0-2 | |
| Indonesia Open MD | 07/18 03:30 | 4 | Lamsfuss/Seidel v Ahsan/Setiawan | L | 0-2 | |
| Indonesia Open MD | 07/17 09:20 | 5 | Lamsfuss M / Seidel M E v Isara / Jongjit | W | 2-1 | |
| US Open 2019, MD | 07/10 17:40 | 5 | Chang / Lu v Lamsfuss/Seidel | L | 2-1 | |
| European Games MD | 06/27 14:00 | - | Maas J / Tabeling R v Lamsfuss/Seidel | L | 2-1 | |
| European Games MD | 06/25 13:45 | - | Lamsfuss/Seidel v Beketov G / Makhnovskiy M | W | 2-0 | |
| Azerbaijan Int. MD | 06/09 14:00 | - | Ellis M / Langridge C v Lamsfuss/Seidel | W | 0-2 | |
| Azerbaijan Int. MD | 06/09 07:30 | - | Arjun / Shlok v Lamsfuss/Seidel | W | 0-2 |