| UTR Pro Tennis Series Mulheim | 2021/10/11 08:30 | Verstegen, Quin v Filip Duda | 6-2,3-6,5-4 |
| ITF M25 Prague | 2021/10/07 11:35 | Filip Duda v Fayziev, Sanjar | 3-6,1-6 |
| ITF M25 Prague | 2021/10/05 08:00 | Filip Duda v Daniel Siniakov | 6-1,6-4 |
| ITF M25 Prague | 2021/10/04 08:00 | Filip Duda v Tomas Lanik | 3-6,6-4,10-3 |
| ITF M25 Prague | 2021/10/03 14:00 | Filip Duda v Krcma, Tomas | 6-0,6-0 |
| ITF M25 Budapest | 2021/10/01 09:25 | Zsombor Piros v Filip Duda | 6-2,3-6,6-3 |
| ITF M25 Budapest | 2021/09/30 09:00 | Nicolas Parizzia v Filip Duda | 2-6,4-6 |
| ITF M25 Budapest | 2021/09/29 07:30 | Filip Duda v Giacalone, Omar | 6-1,6-3 |
| ITF M25 Eupen | 2021/09/07 10:05 | Guy Den Heijer v Tom Gentzsch | 6-3,6-4 |
| ITF M25 Eupen | 2021/09/06 13:30 | Nico Hornitschek v Tom Gentzsch | 4-6,4-6 |
| ITF M25 Eupen | 2021/09/05 07:30 | Tom Gentzsch v Rojas, O. | 6-3,7-5 |
| ITF M25 Trier | 2021/08/25 09:00 | Tom Gentzsch v Ryan Nijboer | 3-6,4-6 |
| ITF M25 Trier | 2021/08/23 13:30 | Paul Valsecchi v Tom Gentzsch | 5-7,3-6 |
| Prostejov, Singles M-ITF-CZE-04A | 2021/08/16 07:55 | Simon Malis v Tom Gentzsch | 6-4,5-7,10-8 |
| Prostejov, Singles M-ITF-CZE-04A | 2021/08/15 08:00 | Krcma, Tomas v Tom Gentzsch | 0-6,2-6 |
| Challenger Meerbusch | 2021/08/08 08:00 | Jesper De Jong v Tom Gentzsch | 6-1,6-3 |