Stadium: Court 7 Round: 62 Ground: Clay
| ITF M15 Skopje | 2021/05/31 12:30 | Petr Michnev v Samuele Pieri | 6-2,6-3 |
| ITF M15 Skopje | 2021/05/30 12:30 | Petr Michnev v Relja Eskic | 6-2,6-0 |
| ITF M25 Prague | 2021/05/11 09:30 | Adam Pavlasek v Petr Michnev | 6-4,6-2 |
| ITF M25 Prague | 2021/05/10 10:30 | Roman Postolka v Petr Michnev | 3-6,2-6 |
| ITF M25 Prague | 2021/05/09 11:00 | Vojtech Vlkovsky v Petr Michnev | 6-2,5-7,8-10 |
| ITF M15 Sibenik | 2021/04/20 12:40 | Francesco Vilardo v Petr Michnev | 6-0,6-4 |
| ITF M15 Sharm El Sheikh | 2021/03/21 09:30 | Petr Michnev v Lorenzo Rottoli | 6-4,3-6,4-10 |
| ITF M15 Sharm El Sheikh | 2021/03/16 07:30 | Petr Michnev v Ben Jones | 6-3,2-6,4-10 |
| ITF M15 Skopje | 2021/05/30 14:00 | Dian Nedev v Boris Butulija | 6-4,4-6,6-10 |
| ITF M15 Brcko | 2021/05/17 15:30 | Boris Butulija v Drazen Petrovic | 2-6,5-7 |
| ITF M15 Sibenik | 2021/04/19 12:15 | Ondrej Horak v Boris Butulija | 6-2,7-6 |
| Challenger Belgrade | 2021/04/11 10:00 | Dmitry Popko v Boris Butulija | 6-2,6-1 |
| ITF M15 Antalya | 2021/03/21 07:00 | Boris Butulija v Bautista Vilicich | 6-4,5-7,9-11 |
| ITF M15 Antalya | 2021/03/14 07:00 | Vladimir Korolev v Boris Butulija | 6-0,6-0 |
| ITF M15 Kazan | 2021/03/09 10:45 | Aleksei Khomich v Boris Butulija | 7-6,6-3 |
| ITF M15 Kazan | 2021/03/08 08:00 | Rail Ibragimov v Boris Butulija | 6-4,4-6,7-10 |