| Summer Universiade | 2019/07/05 12:51 | Adrian Wiecek v Posch, Lars | L | 3-0 |
| Summer Universiade | 2019/07/05 10:43 | Jakub Folwarski v Posch, Lars | L | 3-1 |
| ITTF European Team Championships, Singles | 2019/05/18 12:00 | Jonathan Groth v Posch, Lars | L | 3-1 |
| Slovenia Open | 2019/05/09 13:30 | Yi-Hsin Feng v Posch, Lars | L | 3-1 |
| Slovenia Open | 2019/05/08 11:00 | Posch, Lars v Grampovcnik, Miha | W | 3-0 |
| République tchèque - Extraleague | 2019/02/13 11:20 | Posch, Lars v Xiang, P. | L | 0-4 |
| Qatar Open XD | 2018/04/11 07:00 | Dilling, Andreas v Posch, Lars | L | 3-1 |
| Qatar Open XD | 2018/04/10 07:00 | Kapolnek, Narayan v Posch, Lars | L | 3-0 |
| Challenger Ochsenhausen | 2019/09/26 16:40 | Bartosz Such v Slawomir Dosz | W | 1-3 |
| Paraguay Open U21 Women | 2019/07/20 10:42 | Tiutriumov, Aleksandr v Slawomir Dosz | L | 3-1 |
| Qatar Open XD | 2017/10/04 15:35 | Jean Lauric v Slawomir Dosz | L | 4-0 |