| Campionati panamericani ITTF | 09/10 18:30 | - | Matthew Lehmann v Adrian Perez | L | 0-4 | |
| WTT Feeder Westchester | 05/12 21:30 | - | Matthew Lehmann v Rares Sipos | - | View | |
| Open di Polonia | 03/12 14:00 | - | Matthew Lehmann v Jaroslaw Tomicki | L | 0-3 | |
| Open di Polonia | 03/11 14:20 | - | Matthew Lehmann v Rafael Turrini | L | 1-3 | |
| Czech Republic First League | 03/08 10:58 | - | Matej Stach v Matthew Lehmann | L | 3-2 | |
| Czech Republic First League | 03/08 10:15 | - | Vojtech Klimek v Matthew Lehmann | L | 3-2 | |
| Czech Republic First League | 02/23 11:23 | - | Matthew Lehmann v Tomas Koldas | L | 2-3 | |
| Czech Republic First League | 01/25 10:47 | - | Lukas Boruvka v Matthew Lehmann | W | 0-3 | |
| Open del Nord America | 12/05 21:55 | - | Beixun Zeng v Matthew Lehmann | L | 4-0 | |
| Czech Republic First League | 11/24 09:40 | - | Matthew Lehmann v Marek Obeslo | L | 2-3 | |
| Summer Universiade | 07/09 10:45 | - | Matthew Lehmann v Wang-Wei Peng | L | 0-4 | |
| Open di Slovenia | 05/08 13:40 | - | Amalraj Anthony v Matthew Lehmann | L | 3-0 | |
| Open di Slovenia | 05/08 09:00 | - | Andrei Putuntica v Matthew Lehmann | L | 3-1 | |
| Open di Serbia | 05/02 08:10 | - | Sadi Ismailov v Matthew Lehmann | L | 3-0 | |
| Open di Serbia | 05/01 08:50 | - | Matthew Lehmann v Cedric Meissner | L | 0-3 | |
| Open del Qatar DX | 08/21 09:40 | 1 | Matthew Lehmann v Patryk Zatowka | L | 0-4 | |
| Repubblica Ceca - Extraliga | 08/21 07:00 | 1 | Matthew Lehmann v Masaki Takami | L | 1-3 | |
| Open del Qatar DX | 04/02 08:55 | 1 | Matthew Lehmann v Cedric Tschanz | L | 0-4 | |
| Open del Qatar DX | 01/16 17:10 | 1 | Nima Alamian v Matthew Lehmann | L | 4-2 | |
| Open del Qatar DX | 11/14 13:30 | 1 | Soumyajit Ghosh v Matthew Lehmann | L | 4-0 | |
| Open del Qatar DX | 10/04 09:00 | 1 | Kacper Petas v Matthew Lehmann | L | 3-1 | |
| Open del Qatar DX | 04/27 07:40 | 1 | Matthew Lehmann v Peter Hribar | L | 1-3 | |
| Open del Qatar DX | 11/09 16:56 | - | Michal Obeslo v Matthew Lehmann | L | 4-0 | |
| Open del Qatar DX | 11/09 10:02 | - | Michael Trink v Matthew Lehmann | L | 3-0 |