Round: 26 Ground: Clay
| ITF Turkey F22 | 2016/05/31 11:30 | Andrew Ruppli v Marc Sieber | 3-6,1-6 |
| ITF Turkey F19 | 2016/05/14 09:35 | Dennis Novak v Marc Sieber | 6-4,6-7,6-2 |
| ITF Turkey F19 | 2016/05/13 09:20 | Marc Sieber v Hiromasa Oku | 6-0,6-3 |
| ITF Turkey F18 | 2016/05/08 08:00 | Dennis Novak v Marc Sieber | 6-2,6-2 |
| ITF Turkey F18 | 2016/05/07 08:00 | Marc Sieber v Hugo Nys | 1-6,6-3,6-2 |
| ITF Turkey F18 | 2016/05/06 08:00 | Katsuki Nagao v Marc Sieber | 3-6,6-4,2-6 |
| ITF Turkey F18 | 2016/05/05 09:30 | Keisuke Numajiri v Marc Sieber | 0-6,2-6 |
| ITF Turkey F17 | 2016/05/01 11:00 | Marc Sieber v Christopher Heyman | 6-3,6-0 |
| ITF Germany F2 Qual | 2016/01/17 12:00 | Dominik Boehler v Johann Willems | 6-4,7-6 |
| ITF Turkey F41 | 2015/10/14 07:00 | Bogdan Bobrov v Johann Willems | 7-6,6-1 |
| ITF Turkey F41 | 2015/10/12 07:00 | Muhammet Haylaz v Johann Willems | 3-6,6-4,6-1 |
| ITF Turkey F36 | 2015/10/04 12:00 | Patrik Nema v Johann Willems | 6-3,6-4 |
| ITF Netherlands F6 | 2015/08/25 13:50 | Guy Den Heijer v Johann Willems | 2-6,7-6,6-2 |
| ITF Netherlands F6 | 2015/08/23 12:10 | Vincent Van Den Honert v Johann Willems | 3-6,1-6 |
| ITF Netherlands F6 | 2015/08/22 08:00 | Mats Hermans v Johann Willems | 1-6,4-6 |
| ITF Netherlands F4 | 2015/07/05 08:00 | Roy Sarut De Valk v Johann Willems | 7-5,6-7,5-7 |