| 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 | 2021/10/05 11:30 | Petar Pjevcevic v Duje Kekez | 3-6,6-3,2-6 |
| 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 08:30 | Admir Kalender v Petar Pjevcevic | 6-3,6-1 |
| UTR Pro Tennis Series Zadar | 2021/10/01 12:30 | Petar Pjevcevic v Filip Maric | 4-6,6-2,6-3 |
| UTR Pro Tennis Series Zadar | 2021/09/30 14:00 | Petar Pjevcevic v Lawrence Bataljin | 6-1,6-5 |
| UTR Pro Tennis Series Zadar | 2021/09/29 09:30 | Yanais Laurent v Petar Pjevcevic | 6-2,6-2 |
| UTR Pro Tennis Series Zadar | 2021/09/28 09:30 | Mile Matic v Petar Pjevcevic | 2-6,2-5 |
| UTR Pro Tennis Series Nis | 2021/10/07 14:00 | Duje Kekez v Vladimir Popov | 6-0,5-1 |
| 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 08:30 | Vladimir Popov v Lazar Radenkovic | 6-1,5-2 |
| UTR Pro Tennis Series Sofia | 2021/09/02 07:00 | Vladimir Popov v Christos Keisidis | 7-6,6-7,3-6 |
| UTR Pro Tennis Series Sofia | 2021/09/01 11:00 | Mick Lescure v Vladimir Popov | 1-6,4-6 |
| UTR Pro Tennis Series Sofia | 2021/08/31 11:00 | Mihael Mihaylov v Vladimir Popov | 1-6,3-5 |
| UTR Pro Tennis Series Sofia | 2021/08/30 07:00 | Viktor Markov v Vladimir Popov | 6-3,7-6 |
| UTR Pro Tennis Series Pazardzhik | 2021/07/18 07:30 | Dmitrii Vasilev v Vladimir Popov | 2-6,1-5 |