| Austrian Open - Doubles Hommes | 2021/05/28 17:00 | Niederhuber/Tomic v Rusev/Stoynov | L | 0-2 |
| Austrian Open - Doubles Hommes - Qualif. | 2021/05/28 09:40 | Feltes/Pauquet v Niederhuber/Tomic | W | 0-2 |
| Slovenia Int. MD | 2021/05/20 16:00 | Ban L / Spoljarec F v Niederhuber/Tomic | L | 2-1 |