Stadium: Hard 20 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Heraklion | 2021/05/17 09:30 | Daniel Little v David Eisenzapf | 6-3,6-3 |
| ITF M15 Heraklion | 2021/05/16 10:30 | Ioannis Kountourakis v David Eisenzapf | 3-6,1-6 |
| German Championship | 2020/12/07 15:30 | Stefan Seifert v David Eisenzapf | 6-1,6-4 |
| ITF Germany F16 | 2018/10/21 08:00 | Roy Sarut De Valk v David Eisenzapf | 6-4,3-6,6-3 |
| ITF Germany F4 | 2016/06/20 15:30 | David Eisenzapf v Delf Gohlke | 4-6,5-7 |
| ITF Germany F4 | 2016/06/18 12:30 | David Eisenzapf v Jannik Opitz | 6-2,6-1 |
| ITF Germany F16 | 2015/10/11 07:00 | Bastien Presuhn v David Eisenzapf | 6-4,6-4 |
| ITF Germany F10 Qual | 2015/08/02 08:00 | Flemming Peters v David Eisenzapf | 6-3,6-3 |
| ITF M15 Heraklion | 2021/05/23 06:30 | Ioannis Papounidis v Harry Wendelken | 6-4,3-6,3-10 |
| ITF M15 Monastir | 2021/05/04 08:00 | Zachary Svajda v Harry Wendelken | 7-5,6-1 |
| ITF M15 Monastir | 2021/05/03 12:00 | Miguel Fernando Pereira v Harry Wendelken | 6-7,5-7 |
| ITF M15 Monastir | 2021/05/02 10:30 | Taketo Takamisawa v Harry Wendelken | 1-6,4-6 |
| ITF M15 Monastir | 2021/04/26 12:30 | Remy Bertola v Harry Wendelken | 6-4,3-6,10-5 |
| ITF M15 Monastir | 2021/04/26 08:00 | Osgar O'Hoisin v Harry Wendelken | 6-4,4-6,7-10 |
| ITF M15 Monastir | 2021/04/25 09:00 | Kirill Mishkin v Harry Wendelken | 0-6,0-6 |
| ITF M15 Monastir | 2021/04/20 08:00 | Harry Wendelken v Mirko Martinez | 1-6,2-6 |