| UTR Pro Tennis Series Portoroz | 2021/08/26 07:00 | Robert Rumler v Giacomo Revelli | 3-6,4-6 |
| UTR Pro Tennis Series Portoroz | 2021/08/25 07:00 | Robert Rumler v Paras Dahiya | 7-6,3-6,6-5 |
| ITF M25 Prostejov | 2021/08/17 07:55 | Robert Rumler v Nick Chappell | 0-6,4-6 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/04 15:30 | Robert Rumler v Shintaro Mochizuki | 6-3,3-6,2-6 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/02 14:10 | Robert Rumler v Piotr Galus | 7-5,7-6 |
| UTR Pro Tennis Series Copenhagen | 2021/06/14 08:00 | Robert Rumler v Sebastian Grundtvig Jorgensen | 0-0 |
| ITF M25 Prague | 2021/05/10 08:00 | Robert Rumler v Robin Stanek | 0-6,3-6 |
| ITF M25 Prague | 2021/05/09 07:30 | Marco Furlanetto v Robert Rumler | 6-7,6-1,7-10 |
| UTR Pro Tennis Series Portoroz | 2021/08/26 07:00 | Julien De Cuyper v Gal Emersic Potocnik | 1-6,0-5 |
| UTR Pro Tennis Series Portoroz | 2021/08/24 12:00 | Paras Dahiya v Gal Emersic Potocnik | 4-6,4-5 |
| UTR Pro Tennis Series Portoroz | 2021/08/21 14:15 | Aleksa Pisaric v Gal Emersic Potocnik | 6-7,6-1,5-3 |
| UTR Pro Tennis Series Portoroz | 2021/08/19 08:00 | Gal Emersic Potocnik v Timur Maulenov | 3-6,6-1,4-6 |
| UTR Pro Tennis Series Portoroz | 2021/08/18 09:30 | Gal Emersic Potocnik v Alec Adamson | 6-3,7-6 |
| UTR Pro Tennis Series Portoroz | 2021/08/17 08:00 | Gal Emersic Potocnik v Deni Zmak | 1-6,4-6 |
| UTR Pro Tennis Series Portoroz | 2021/08/16 08:00 | Gal Emersic Potocnik v Denis Parshutin | 6-1,0-6,2-6 |
| ITF M25 Velenje | 2021/07/07 08:00 | Peter Goldsteiner v Gal Emersic Potocnik | 6-1,6-0 |