Ground: Carpet indoor
| UTR Pro Olomouc | 2023/09/13 07:30 | Robert Rumler v Sergo Sikharulidze | 6-0,6-1 |
| UTR Pro Olomouc | 2023/09/12 09:00 | Robert Rumler v Matthew William Donald | 2-6,0-6 |
| UTR Pro Olomouc | 2023/09/11 06:00 | Robert Rumler v Petr Michnev | 1-6,4-6 |
| ITF M25 Maribor | 2023/08/30 12:00 | Robert Rumler v Nicolas Zanellato | 0-6,2-6 |
| ITF M25 Maribor | 2023/08/29 10:55 | Robert Rumler v Maks Meh | 1-6,6-0,10-6 |
| ITF M25 Maribor | 2023/08/28 11:25 | Robert Rumler v Marko Novak | 6-1,6-3 |
| UTR Pro Olomouc | 2023/07/08 08:06 | Dominik Suc v Robert Rumler | 6-4,7-6 |
| UTR Pro Olomouc | 2023/07/07 06:00 | Alessandro-D Ventre v Robert Rumler | 6-3,2-6,4-5 |
| UTR Pro Olomouc | 2023/09/13 06:00 | Petr Michnev v Mikolaj Lis | 6-3,6-1 |
| UTR Pro Olomouc | 2023/09/11 07:30 | Matthew William Donald v Mikolaj Lis | 6-1,5-3 |
| ITF M15 Koszalin | 2023/09/06 09:40 | Mikolaj Lis v Mateusz Terczynski | 1-6,3-6 |
| ITF M15 Koszalin | 2023/09/05 10:40 | Mikolaj Lis v Michal Matuszewski | 6-0,7-5 |
| ITF M15 Koszalin | 2023/09/04 12:00 | Mikolaj Lis v William Rejchtman Vinciguerra | 4-6,6-3,10-5 |
| ITF M15 Szczawno | 2023/08/28 10:00 | Mikolaj Lis v Maciej Matuszczyk | 6-4,3-6,8-10 |
| ITF M25 Bielsko Biala | 2023/08/16 12:40 | Mikolaj Lis v Stephanos Schinas | 6-3,4-6,6-7 |
| ITF M25 Bielsko Biala | 2023/08/14 16:15 | Mikolaj Lis v Norbert Marosik | 6-2,7-6 |