Round: 62 Ground: Clay
| ITF Germany F10 | 2017/08/06 13:00 | Guttau, Niklas v Lang, Robin | 2-6,6-4,3-6 |
| ITF Germany F10 | 2017/08/06 08:00 | Guttau, Niklas v Venkat, Varun | 6-1,6-2 |
| ITF Germany F9 | 2017/07/31 09:00 | Monteban, Paul v Guttau, Niklas | 6-3,6-1 |
| ITF Germany F4 | 2017/06/20 09:00 | Guttau, Niklas v Kocevar-Desman, Tom | 3-6,2-6 |
| Egypt F14, Singles Qualifying | 2017/04/15 08:00 | Guttau, Niklas v Kokulewski, Arnold | 6-7,4-6 |
| ITF Egypt F13 | 2017/04/10 08:00 | Feitt, Franco v Guttau, Niklas | 6-7,6-3,6-3 |
| ITF Egypt F13 | 2017/04/09 08:00 | Patel, Megh Bhargav v Guttau, Niklas | 6-7,4-6 |
| ITF Egypt F13 | 2017/04/08 07:00 | Guttau, Niklas v Charlos, Tomas | 5-7,6-1,6-4 |