Stadium: Court 4 Round: 62 Ground: Clay
| ITF M25 Meerbusch | 2021/04/12 10:00 | Alessio Vasquez Gehrke v Mark Owen Endler | 6-7,3-6 |
| ITF M25 Meerbusch | 2021/04/11 12:30 | Mark Owen Endler v Julian Peter | 6-1,6-0 |
| Challenger Gran Canaria | 2021/02/23 10:00 | Alex Molcan v Mark Owen Endler | 6-0,6-1 |
| ITF M25 Villena | 2021/02/01 10:30 | Javier Molino v Mark Owen Endler | 6-4,5-7,10-6 |
| ITF M15 Manacor | 2021/01/10 12:30 | Mark Owen Endler v Andrew Paulson | 3-6,0-6 |
| ITF M15 Manacor | 2021/01/03 11:30 | Kenny de Schepper v Mark Owen Endler | 6-3,6-1 |
| ITF M15 Monastir | 2020/09/20 11:00 | Mark Owen Endler v Karl Kiur Saar | 7-5,4-6,7-10 |
| ITF M15 Monastir | 2020/09/13 10:30 | Mark Owen Endler v Benedikt Henning | 0-6,3-6 |
| ITF M25 Meerbusch | 2021/04/12 10:00 | Floris Podzimek v Niels Visker | 3-6,2-6 |
| ITF M25 Meerbusch | 2021/04/11 14:00 | Tommaso Compagnucci v Niels Visker | 3-6,1-6 |
| ITF M15 Sharm El Sheikh | 2021/03/17 08:40 | Niels Visker v Mikolaj Lorens | 5-7,4-6 |
| ITF M15 Sharm El Sheikh | 2021/03/16 09:20 | Niels Visker v Maik Steiner | 6-3,6-4 |
| ITF M15 Sharm El Sheikh | 2021/03/15 07:30 | Niels Visker v Ondrej Horak | 6-7,7-6,13-11 |
| ITF M15 Sharm El Sheikh | 2021/03/11 10:40 | Petros Chrysochos v Niels Visker | 6-3,6-3 |
| ITF M15 Sharm El Sheikh | 2021/03/10 13:45 | Makoto Ochi v Niels Visker | 6-4,3-6,6-7 |
| ITF M15 Sharm El Sheikh | 2021/03/09 09:45 | Petr Michnev v Niels Visker | 3-6,6-2,5-10 |