Stadium: Court 2 Round: 28 Ground: Clay
| ITF M25 Prague | 2021/10/08 11:10 | Simon, Tobias v Ignatik, Uladzimir | 2-6,7-6,6-4 |
| ITF M25 Prague | 2021/10/07 14:05 | Simon, Tobias v Milos Karol | 6-4,4-6,7-6 |
| ITF M25 Prague | 2021/10/06 12:20 | Simon, Tobias v Matthew William Donald | 6-3,4-6,6-3 |
| ITF M25 Falun | 2021/09/28 13:15 | Simon, Tobias v Daniel Little | 6-7,3-6 |
| Challenger Biel | 2021/09/20 09:00 | Simon, Tobias v Jakub Paul | 4-6,4-6 |
| Challenger Biel | 2021/09/19 11:15 | Laurent Lokoli v Simon, Tobias | 4-6,2-6 |
| ITF M25 Plaisir | 2021/09/15 14:05 | Briand, Jurgen v Simon, Tobias | 6-4,7-6 |
| Challenger Tulln | 2021/09/06 10:25 | Ignatik, Uladzimir v Simon, Tobias | 6-4,4-6,7-5 |
| ITF M25 Prague | 2021/10/08 09:00 | David Poljak v Fayziev, Sanjar | 6-4,6-2 |
| ITF M25 Prague | 2021/10/07 11:55 | David Poljak v Nejedly, Pavel | 6-3,3-6,6-2 |
| ITF M25 Prague | 2021/10/06 15:20 | David Poljak v Leopold Zima | 6-4,6-1 |
| Challenger Sibiu | 2021/09/26 07:30 | Bondarevskiy, Yan v David Poljak | 7-5,3-6,6-3 |
| Challenger Bucharest | 2021/09/19 09:45 | David Poljak v Ignatik, Uladzimir | 4-6,1-6 |
| Challenger Banja Luka | 2021/09/07 08:00 | David Poljak v Tomas Martin Etcheverry | 2-6,5-7 |
| Challenger Banja Luka | 2021/09/06 11:35 | David Poljak v Mircea-Alexandru Jecan | 6-3,6-4 |
| Challenger Banja Luka | 2021/09/05 12:25 | David Poljak v Moez Echargui | 2-6,6-3,6-2 |