| UTR Pro Tennis Series - Nis | 2021/10/09 10:15 | Andrey Chepelev v Ivan Liutarevich | 5-7,4-6 |
| UTR Pro Tennis Series - Nis | 2021/10/07 07:00 | Ivan Liutarevich v Oleksandr Bielinskyi | 5-7,6-4,5-2 |
| UTR Pro Tennis Series - Nis | 2021/10/06 08:30 | Ivan Liutarevich v Lawrence Bataljin | 7-5,6-3 |
| UTR Pro Tennis Series - Nis | 2021/10/05 09:30 | Ivan Liutarevich v Veljko Krstic | 5-7,6-4,6-2 |
| UTR Pro Tennis Series - Nis | 2021/10/04 10:00 | Ivan Liutarevich v Stefan Ivic | 6-4,6-0 |
| UTR Pro Tennis Series - Zadar | 2021/10/02 13:00 | Lawrence Bataljin v Ivan Liutarevich | 6-4,6-3 |
| UTR Pro Tennis Series - Zadar | 2021/09/30 12:00 | Ivan Liutarevich v Michalis Sakellaridis | 6-7,5-6 |
| UTR Pro Tennis Series - Zadar | 2021/09/29 15:00 | Ivan Liutarevich v Deni Zmak | 4-6,6-4,6-6 |
| UTR Pro Tennis Series - Nis | 2021/10/09 10:15 | Alexander Lazov v Duje Kekez | 6-3,3-6,5-1 |
| UTR Pro Tennis Series - Nis | 2021/10/08 18:15 | George Botezan v Alexander Lazov | 2-6,3-5 |
| UTR Pro Tennis Series - Nis | 2021/10/07 10:00 | Aleksa Mardjonovic v Alexander Lazov | 2-6,4-5 |
| UTR Pro Tennis Series - Nis | 2021/10/06 11:30 | Dusan Trunic v Alexander Lazov | 6-4,2-6,1-6 |
| UTR Pro Tennis Series - Nis | 2021/10/04 11:30 | Christos Keisidis v Alexander Lazov | 6-3,0-6,3-6 |
| UTR Pro Tennis Series - Ricany | 2021/09/18 09:00 | Antonin Bolardt v Alexander Lazov | 4-6,6-4,2-5 |
| UTR Pro Tennis Series - Ricany | 2021/09/16 07:00 | Alexander Lazov v Jan Satral | 1-6,2-6 |
| UTR Pro Tennis Series - Ricany | 2021/09/15 12:00 | Alexander Lazov v Yanais Laurent | 4-6,6-1,3-5 |