Stadium: Court 2 Round: 44 Ground: Clay
| ITF M25 Telavi | 2021/07/26 13:10 | Petr Bar Biryukov v Ondrej Horak | 4-6,2-6 |
| ITF M25 Telfs | 2021/07/16 10:00 | Kirill Kivattsev v Ondrej Horak | 6-2,6-2 |
| ITF M25 Telfs | 2021/07/14 07:55 | George Botezan v Ondrej Horak | 6-4,2-6,5-7 |
| ITF M25 Telfs | 2021/07/13 07:30 | Neil Oberleitner v Ondrej Horak | 4-6,4-6 |
| ITF M25 Telfs | 2021/07/12 07:55 | Ondrej Horak v Samuel Puskar | 6-3,6-4 |
| ITF M25 Wroclaw | 2021/06/28 10:00 | Daniel Dutra Da Silva v Ondrej Horak | 3-6,0-6 |
| ITF M15 Skopje | 2021/06/07 08:30 | Leonid Sheyngezikht v Ondrej Horak | 6-0,7-5 |
| ITF M15 Skopje | 2021/06/06 09:00 | Ondrej Horak v Luigi Sorrentino | 6-0,1-6,11-9 |
| ITF M25 Telavi | 2021/07/26 11:30 | Amit Cohen v Alexander Boborykin | 3-6,2-6 |
| ITF M15 Shymkent | 2021/06/02 11:20 | Vladyslav Manafov v Alexander Boborykin | 6-2,6-0 |
| ITF M15 Shymkent | 2021/06/01 05:00 | Pavel Verbin v Alexander Boborykin | 7-6,6-7,9-11 |
| ITF M15 Shymkent | 2021/05/31 08:20 | Victor Gurevich v Alexander Boborykin | 0-6,2-6 |
| ITF M15 Shymkent | 2021/05/24 07:25 | Roman Nashatyrkin v Alexander Boborykin | 7-5,6-1 |
| ITF M15 Tbilisi | 2021/05/19 06:00 | Zura Tkemaladze v Alexander Boborykin | 6-3,3-6,6-3 |
| ITF M15 Tbilisi | 2021/05/18 05:30 | Sergo Sikharulidze v Alexander Boborykin | 6-7,4-6 |
| ITF M15 Tbilisi | 2021/05/17 05:30 | Danial Rakhmatullayev v Alexander Boborykin | 3-6,2-6 |