Stadium: Opatija 3 Round: 28 Ground: Clay
| ITF M25 Budapest | 2021/10/03 12:30 | Pawel Juszczak v Mate Valkusz | 3-6,4-6 |
| ITF M25 Budapest | 2021/10/02 12:20 | Mate Valkusz v Fabian Marozsan | 6-3,6-3 |
| ITF M25 Budapest | 2021/10/01 10:00 | Martin Krumich v Mate Valkusz | 2-6,1-6 |
| ITF M25 Budapest | 2021/09/30 09:00 | Milos Karol v Mate Valkusz | 6-7,0-6 |
| ITF M25 Budapest | 2021/09/29 09:20 | Matyas Fuele v Mate Valkusz | 0-6,2-6 |
| Challenger Tulln | 2021/09/06 08:00 | Matteo Martineau v Mate Valkusz | 7-5,1-6,6-4 |
| Challenger Tulln | 2021/09/05 10:25 | Mate Valkusz v Marek Gengel | 6-0,6-1 |
| ITF M15 Bratislava | 2021/08/29 08:00 | Mate Valkusz v Danylo Kalenichenko | 6-0,6-2 |
| Challenger Braga | 2021/09/21 09:00 | Igor Sijsling v Michael Vrbensky | 1-6,4-6 |
| Challenger Kyiv | 2021/09/06 11:35 | Matheus Pucinelli De Almeida v Michael Vrbensky | 6-3,6-2 |
| Challenger Warsaw | 2021/08/28 09:00 | Michael Vrbensky v Nino Serdarusic | 6-7,2-6 |
| Challenger Warsaw | 2021/08/26 13:05 | Michael Vrbensky v Jeroen Vanneste | 6-0,4-6,6-3 |
| Challenger Warsaw | 2021/08/25 09:35 | Vitaliy Sachko v Michael Vrbensky | 6-2,6-7,4-6 |
| Challenger Luedenscheid | 2021/08/17 11:35 | Juan Manuel Cerundolo v Michael Vrbensky | 6-4,6-2 |
| Challenger Prague | 2021/08/10 12:00 | Michael Vrbensky v Evgeny Tyurnev | 4-6,2-6 |
| Challenger Liberec | 2021/08/02 13:35 | Michael Vrbensky v Marc Polmans | 7-6,2-6,5-7 |