| UTR Pro Tennis Series Nis | 2021/10/06 10:00 | Ivan Denisov v Duje Kekez | 1-6,4-6 |
| UTR Pro Tennis Series Nis | 2021/10/05 10:30 | Ivan Denisov v Vladimir Popov | 6-2,5-4 |
| UTR Pro Tennis Series Nis | 2021/10/04 12:15 | Ivan Denisov v Petar Pjevcevic | 6-7,6-2,0-5 |
| UTR Pro Tennis Series Zadar | 2021/10/02 11:30 | Christos Keisidis v Ivan Denisov | 3-6,6-1,6-5 |
| UTR Pro Tennis Series Zadar | 2021/10/01 09:30 | Maxim Krapivin v Ivan Denisov | 5-7,3-6 |
| UTR Pro Tennis Series Zadar | 2021/09/30 12:00 | Deni Zmak v Ivan Denisov | 2-6,6-2,6-5 |
| UTR Pro Tennis Series Zadar | 2021/09/28 11:00 | Ivan Liutarevich v Ivan Denisov | 3-6,2-6 |
| UTR Pro Tennis Series Zadar | 2021/09/27 11:00 | Ivan Denisov v Michalis Sakellaridis | 6-2,5-1 |
| UTR Pro Tennis Series Nis | 2021/10/06 10:00 | Petar Pjevcevic v Lazar Radenkovic | 4-6,6-3,6-2 |
| UTR Pro Tennis Series Nis | 2021/10/04 08:30 | Vladimir Popov v Lazar Radenkovic | 6-1,5-2 |