| 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 |
| ITF M15 Olomouc | 2019/10/17 07:55 | Petr Nouza v Robert Rumler | 6-7,6-4,6-4 |
| ITF M15 Warmbad-Villach | 2021/08/18 13:05 | Giacomo Revelli v Sebastian Prechtel | 3-6,3-6 |
| ITF M15 Warmbad-Villach | 2021/08/17 12:00 | Leonardo Taddia v Giacomo Revelli | 4-6,1-6 |
| ITF M15 Warmbad-Villach | 2021/08/17 07:30 | Marco De Rosa v Giacomo Revelli | 7-6,4-6,1-10 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/05 07:00 | Pedro Sakamoto v Giacomo Revelli | 5-7,6-2,6-3 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/02 14:30 | Alan Bojarski v Giacomo Revelli | 3-6,2-6 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/02 11:00 | Giacomo Revelli v Michal Wozniak | 6-3,6-2 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/01 12:45 | Makary Adamek v Giacomo Revelli | 1-6,1-6 |
| ITF M25 Denia | 2021/07/29 08:00 | Giacomo Revelli v Calvin Hemery | 3-6,1-6 |