Stadium: Court 6 Round: 25 Ground: Clay
| ITF Germany F10 | 2017/08/08 11:50 | Mertens, Nico v Benjamin Hassan | 6-3,3-6,2-6 |
| ITF Germany F10 | 2017/08/07 10:00 | Maxence Beauge v Mertens, Nico | 3-6,3-6 |
| ITF Germany F10 | 2017/08/06 13:00 | Mrazek, David v Mertens, Nico | 4-6,6-7 |
| ITF Germany F10 | 2017/08/06 08:00 | Daljev, Pavle v Mertens, Nico | 6-3,3-6,3-6 |
| ITF Germany F9 | 2017/08/01 12:55 | Mertens, Nico v Fallert, Florian | 4-6,1-6 |
| ITF Germany F9 | 2017/07/31 15:00 | de Valk, Roy Sarut v Mertens, Nico | 2-6,6-7 |
| ITF Germany F8 Qual | 2017/07/17 13:00 | Mertens, Nico v Matthew Dellavedova | 6-1,2-6,2-6 |
| ITF Germany F8 Qual | 2017/07/16 08:00 | Mertens, Nico v Markiewicz, James | 2-6,6-3,6-4 |
| ITF Netherlands F5 | 2017/08/14 12:00 | Fransen, Stephan v van Der Horst, Tim | 6-1,6-1 |
| ITF Netherlands F5 | 2017/08/13 16:00 | Fransen, Stephan v Smith, Barnaby | 6-2,6-0 |
| ITF Netherlands F4 | 2017/07/14 16:20 | Hocevar, Ricardo v Fransen, Stephan | 6-7,6-2,7-5 |
| ITF Netherlands F4 | 2017/07/13 09:00 | Fransen, Stephan v Stevens, Bart | 6-4,6-3 |
| ITF Netherlands F4 | 2017/07/11 10:05 | Vibert, Francois Arthur v Fransen, Stephan | 5-7,5-7 |
| ITF Netherlands F4 | 2017/07/08 08:00 | Fransen, Stephan v Jonhagen, Johan | 6-1,6-0 |
| ITF Spain F11 | 2017/04/22 13:00 | Fransen, Stephan v van Den Brink, Floris | 2-6,4-6 |
| Challenger Casablanca | 2015/10/11 11:30 | Hamou, Maxime v Fransen, Stephan | 6-1,6-2 |