| UTR Pro Tennis Series Portoroz | 2021/08/26 10:00 | Robert Rumler v Gal Emersic Potocnik | 6-2,6-1 |
| 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 |
| UTR Pro Tennis Series Portoroz | 2021/08/27 12:00 | Vladan Tadic v Volodymyr Uzhylovskyi | 5-7,2-6 |
| UTR Pro Tennis Series Portoroz | 2021/08/26 07:00 | Nik Razborsek v Volodymyr Uzhylovskyi | 6-3,5-7,5-7 |
| UTR Pro Tennis Series Portoroz | 2021/08/25 10:00 | Olexiy Kolisnyk v Volodymyr Uzhylovskyi | 6-1,6-1 |
| UTR Pro Tennis Series Portoroz | 2021/08/17 12:30 | Volodymyr Uzhylovskyi v Max Lukman | 6-1,5-1 |
| ITF M15 Cairo | 2021/08/02 11:30 | Volodymyr Uzhylovskyi v Lautaro Agustin Falabella | 2-6,6-2,10-12 |
| ITF M15 Cairo | 2021/08/01 09:00 | Volodymyr Uzhylovskyi v Sherif Makhlouf | 6-3,6-3 |
| ITF M15 Cairo | 2021/07/27 08:00 | Volodymyr Uzhylovskyi v Facundo Arias Bisso | 3-6,3-6 |
| ITF M15 Cairo | 2021/07/26 08:00 | Volodymyr Uzhylovskyi v Mattia Rossi | 6-1,7-5 |