Stadium: Court 2 Round: 25 Ground: Clay
| ITF M25 Decatur | 2021/08/07 14:45 | Eliot Spizzirri v Alex Rybakov | 6-4,7-5 |
| ITF M25 Decatur | 2021/08/06 15:00 | Alex Rybakov v Gijs Brouwer | 7-5,6-3 |
| ITF M25 Decatur | 2021/08/05 17:40 | Sekou Bangoura v Alex Rybakov | 1-6,4-6 |
| ITF M25 Decatur | 2021/08/04 17:25 | Connor Farren v Alex Rybakov | 5-7,1-6 |
| ATP Los Cabos | 2021/07/19 00:00 | Ernesto Escobedo v Alex Rybakov | 6-2,7-6 |
| ATP Los Cabos | 2021/07/18 02:40 | Gage Brymer v Alex Rybakov | 3-6,4-6 |
| ITF M25 Klosters | 2021/06/23 07:00 | Alex Rybakov v Leandro Riedi | 6-3,6-7,2-6 |
| Challenger Prostejov | 2021/06/15 11:05 | Blaz Rola v Alex Rybakov | 6-1,7-5 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/08 08:00 | David Poljak v Zsombor Piros | 4-6,6-7 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/07 11:55 | David Poljak v Adam Pavlasek | 4-6,7-6,6-1 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/07 07:25 | David Poljak v Michal Dembek | 6-3,3-6,6-3 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/04 17:10 | David Poljak v Szymon Kielan | 7-5,6-3 |
| Challenger Poznan | 2021/07/27 16:25 | Elmar Ejupovic v David Poljak | 6-2,6-4 |
| Challenger Poznan | 2021/07/26 11:35 | David Poljak v Lucas Gerch | 7-5,1-6,6-4 |
| Challenger Poznan | 2021/07/25 13:25 | Thomaz Bellucci v David Poljak | 6-4,3-6,1-6 |
| ITF M25 Kottingbrunn | 2021/07/22 08:00 | Mate Valkusz v David Poljak | 6-7,7-5,7-5 |