| ITF M15 Bad Waltersdorf | 2021/08/22 09:00 | Petr Hajek v Gabriel Decamps | 6-7,2-6 |
| ITF M15 Warmbad-Villach | 2021/08/18 08:00 | Petr Hajek v Tom Kocevar-Desman | 4-6,7-5,4-6 |
| ITF M15 Warmbad-Villach | 2021/08/17 08:00 | Petr Hajek v Ioannis Xilas | 6-3,7-6 |
| ITF M15 Warmbad-Villach | 2021/08/16 12:30 | Petr Hajek v Daniele Valentino | 6-3,6-1 |
| ITF M15 Gdynia | 2021/08/12 08:00 | Filip Peliwo v Petr Hajek | 6-1,6-3 |
| ITF M15 Gdynia | 2021/08/11 12:30 | Petr Hajek v Maks Kasnikowski | 6-4,6-7,7-5 |
| ITF M15 Gdynia | 2021/08/10 08:00 | Petr Hajek v Filip Pieczonka | 5-7,4-6 |
| ITF M15 Gdynia | 2021/08/09 10:30 | Petr Hajek v Simonas Zukauskas | 6-0,6-1 |
| Challenger Prague | 2021/08/23 13:00 | Rudolf Molleker v Andrew Paulson | 7-5,4-6,6-1 |
| ITF M15 Bratislava | 2021/08/19 12:20 | David Pichler v Andrew Paulson | 2-6,6-3,6-2 |
| ITF M15 Bratislava | 2021/08/17 14:05 | Boris Pokotilov v Andrew Paulson | 6-4,0-6,2-6 |
| Challenger Prague | 2021/08/08 09:40 | Andrew Paulson v Carlos Gomez-Herrera | 1-6,3-6 |
| Challenger Prostejov | 2021/06/14 14:20 | Andrew Paulson v Hugo Dellien | 1-6,3-6 |
| ITF M25 Most | 2021/05/27 07:55 | Gijs Brouwer v Andrew Paulson | 6-2,2-6,7-6 |
| ITF M25 Most | 2021/05/26 09:50 | Andrew Paulson v Christian Lindell | 6-2,6-3 |
| ITF M25 Jablonec Nad Nisou | 2021/05/21 09:00 | Andrew Paulson v Evan Furness | 0-6,3-6 |