| UTR Pro Tennis Series - Zadar | 2021/11/20 09:00 | Janos Fekete v Lawrence Bataljin | 6-3,5-7,6-7 |
| UTR Pro Tennis Series - Zadar | 2021/11/19 11:30 | Vladan Tadic v Lawrence Bataljin | 4-6,4-6 |
| UTR Pro Tennis Series - Zadar | 2021/11/18 09:00 | Lawrence Bataljin v Domagoj Biljesko | 1-6,1-6 |
| UTR Pro Tennis Series - Zadar | 2021/11/15 13:30 | Lawrence Bataljin v Petar Pjevcevic | 1-6,6-2,6-3 |
| UTR Pro Tennis Series - Zadar | 2021/11/14 13:00 | Michalis Sakellaridis v Lawrence Bataljin | 6-7,3-5 |
| UTR Pro Tennis Series - Amsterdam | 2021/11/06 09:00 | Lawrence Bataljin v Edison Ambarzumjan | 3-6,6-2,1-6 |
| UTR Pro Tennis Series - Amsterdam | 2021/11/05 09:00 | Jip Van Assendelft v Lawrence Bataljin | 7-6,6-2 |
| UTR Pro Tennis Series - Amsterdam | 2021/11/04 12:00 | Miko Wassermann v Lawrence Bataljin | 6-1,6-3 |
| UTR Pro Tennis Series - Zadar | 2021/11/20 09:00 | Martin Dimitrov v Robert Rumler | 2-6,4-4 |
| UTR Pro Tennis Series - Zadar | 2021/11/19 12:00 | Alexander Chepik v Robert Rumler | 3-6,1-5 |
| UTR Pro Tennis Series - Zadar | 2021/11/18 12:00 | Robert Rumler v Vladimir Popov | 6-2,5-1 |
| UTR Pro Tennis Series - Zadar | 2021/11/16 12:00 | Robert Rumler v Duje Kekez | 2-6,4-6 |
| UTR Pro Tennis Series - Zadar | 2021/11/15 12:00 | Robert Rumler v Valerii Naumenko | 6-0,6-0 |
| UTR Pro Tennis Series - Portoroz | 2021/08/29 09:30 | Robert Rumler v Egor Agafonov | 7-6,6-1 |
| 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 |