| Polish Open | 2020/03/12 14:00 | Matthew Lehmann v Jaroslaw Tomicki | L | 0-3 |
| Polish Open | 2020/03/11 14:20 | Matthew Lehmann v Rafael Turrini | L | 1-3 |
| Czech Republic First League | 2020/03/08 10:58 | Matej Stach v Matthew Lehmann | L | 3-2 |
| Czech Republic First League | 2020/03/08 10:15 | Vojtech Klimek v Matthew Lehmann | L | 3-2 |
| Czech Republic First League | 2020/02/23 11:23 | Matthew Lehmann v Tomas Koldas | L | 2-3 |
| Czech Republic First League | 2020/01/25 10:47 | Lukas Boruvka v Matthew Lehmann | W | 0-3 |
| North American Open | 2019/12/05 21:55 | Beixun Zeng v Matthew Lehmann | L | 4-0 |
| Czech Republic First League | 2019/11/24 09:40 | Matthew Lehmann v Marek Obeslo | L | 2-3 |
| WTT Feeder Freemont | 2022/05/07 03:30 | Rares Sipos v Enzo Angles | L | 2-3 |
| WTT Feeder Freemont | 2022/05/06 19:30 | Yuta Tanaka v Rares Sipos | W | 2-3 |
| WTT Star Contender - Doha | 2022/03/25 12:45 | Wang-Wei Peng v Rares Sipos | L | 3-2 |
| WTT Contender - Doha | 2022/03/18 15:45 | Mehdi Bouloussa v Rares Sipos | L | 3-1 |
| WTT Feeder - Doha | 2022/03/15 17:25 | Rares Sipos v Cristian Pletea | L | 2-3 |
| WTT Feeder - Doha | 2022/03/15 10:05 | Jiri Martinko v Rares Sipos | W | 1-4 |
| WTT - Feeder Dusseldorf | 2022/01/19 13:15 | Felix Lebrun v Rares Sipos | L | 4-1 |
| WTT - Feeder Dusseldorf | 2022/01/18 18:40 | Rares Sipos v Ruwen Filus | W | 4-1 |