Estádio: Centre Court Round: 25 Ground: Clay
| ITF - M15 São Petersburgo | 2021/04/15 12:00 | Patrik Rikl v Yanki Erel | 3-6,5-7 |
| ITF - M15 São Petersburgo | 2021/04/13 11:30 | Patrik Rikl v Aristarkh Safonov | 6-4,6-2 |
| ITF - M15 São Petersburgo | 2021/04/07 08:50 | Gijs Brouwer v Patrik Rikl | 6-2,4-6,7-5 |
| ITF - M15 Bratislava | 2021/03/12 09:00 | Fabian Marozsan v Patrik Rikl | 4-6,6-3,6-4 |
| ITF - M15 Bratislava | 2021/03/11 09:00 | Patrik Rikl v Vitaliy Sachko | 6-4,3-6,6-3 |
| ITF - M15 Bratislava | 2021/03/10 13:40 | Patrik Rikl v Amaury Raynel | 6-3,6-1 |
| ITF - M15 Bratislava | 2021/03/05 12:20 | Patrik Rikl v Jurgen Briand | 5-7,1-6 |
| ITF - M15 Bratislava | 2021/03/04 09:00 | Jonathan Eysseric v Patrik Rikl | 6-7,4-6 |
| Challenger - Roma | 2021/04/22 09:00 | Lorenzo Giustino v Sergiy Stakhovsky | 6-4,6-4 |
| Challenger - Roma | 2021/04/20 11:40 | Sergiy Stakhovsky v Mathias Bourgue | 6-4,3-6,7-5 |
| Challenger - Lugano | 2021/03/25 11:00 | Sergiy Stakhovsky v Vitaliy Sachko | 3-6,1-6 |
| Challenger - Lugano | 2021/03/23 11:25 | Sergiy Stakhovsky v Francesco Forti | 6-4,6-2 |
| Challenger - Biella | 2021/03/19 13:05 | Daniel Masur v Sergiy Stakhovsky | 7-6,6-4 |
| Challenger - Biella | 2021/03/17 13:35 | Sergiy Stakhovsky v Marc-Andrea Huesler | 7-5,3-6,7-6 |
| Challenger - Biella | 2021/03/15 15:45 | Sergiy Stakhovsky v Matteo Gigante | 7-5,5-7,6-2 |
| Challenger - Biella | 2021/03/10 11:40 | Sergiy Stakhovsky v Andreas Seppi | 2-6,4-6 |