Stadium: Cancha 4 Round: 25 Ground: Hardcourt outdoor
| Challenger Salinas | 2021/04/19 16:55 | Marek Gengel v Mathieu Perchicot | 6-3,3-6,7-5 |
| Challenger Salinas | 2021/04/18 16:55 | Marek Gengel v Omar Suarez | 6-1,6-1 |
| ITF M15 Sharm El Sheikh | 2021/03/31 07:30 | Marek Gengel v Aldin Setkic | 4-6,6-4,3-6 |
| ITF M15 Sharm El Sheikh | 2021/03/27 07:30 | Makoto Ochi v Marek Gengel | 2-6,6-2,6-3 |
| ITF M15 Sharm El Sheikh | 2021/03/26 07:30 | Petros Chrysochos v Marek Gengel | 2-6,3-6 |
| ITF M15 Sharm El Sheikh | 2021/03/25 07:30 | Takuto Niki v Marek Gengel | 1-6,0-6 |
| ITF M15 Sharm El Sheikh | 2021/03/24 08:45 | Mattia Bellucci v Marek Gengel | 1-6,4-6 |
| ITF M15 Sharm El Sheikh | 2021/03/19 09:20 | Marek Gengel v Makoto Ochi | 3-6,6-3,3-6 |
| Challenger Salinas | 2021/04/19 14:30 | Alejandro Gonzalez v Tak Khunn Wang | 2-6,6-1,0-6 |
| Challenger Salinas | 2021/04/18 15:00 | Tak Khunn Wang v David Poljak | 6-3,6-3 |
| ITF M25 Meerbusch | 2021/04/15 10:00 | Tak Khunn Wang v Peter Heller | 1-6,3-6 |
| ITF M25 Meerbusch | 2021/04/13 13:30 | Tak Khunn Wang v Marvin Moeller | 6-4,6-3 |
| Challenger Split | 2021/04/04 10:30 | Akira Santillan v Tak Khunn Wang | 4-6,6-1,7-6 |
| Challenger Lille | 2021/03/22 10:00 | Matteo Martineau v Tak Khunn Wang | 7-5,7-5 |
| Challenger Lille | 2021/03/21 11:15 | Tak Khunn Wang v Antoine Escoffier | 5-7,6-4,6-4 |
| ITF M25 Vale Do Lobo | 2021/03/13 13:20 | Sebastian Fanselow v Tak Khunn Wang | 6-1,6-3 |