Stadium: Centre Court Round: 27 Ground: Clay
| ITF Germany F12 | 2017/08/24 10:15 | Sieber, Marc v Schmidt, Gabriel | 6-3,6-4 |
| ITF Germany F12 | 2017/08/23 15:00 | Sieber, Marc v Link, Joel Vincent | 6-4,6-1 |
| Challenger Meerbusch | 2017/08/17 11:00 | Sieber, Marc v Karim-Mohamed Maamoun | 2-6,3-6 |
| Challenger Meerbusch | 2017/08/15 17:00 | Brown, Dustin v Sieber, Marc | 2-6,2-6 |
| Meerbusch, Allemagne, Qualifications | 2017/08/14 09:30 | Sieber, Marc v Gimeno-Traver, Daniel | 7-5,6-3 |
| Meerbusch, Allemagne, Qualifications | 2017/08/13 12:55 | Sieber, Marc v Alexandar Lazarov | 6-3,6-2 |
| Challenger Marburg Qual | 2017/07/02 10:20 | Sieber, Marc v Bachinger, Matthias | 2-6,7-6,3-6 |
| Challenger Marburg Qual | 2017/07/01 10:00 | Sieber, Marc v Naow, Amer | 6-1,6-2 |
| ITF Germany F12 | 2017/08/24 14:10 | Lang, Robin v Louis Wessels | 5-7,1-6 |
| ITF Germany F12 | 2017/08/23 12:30 | Obert, Adrian v Louis Wessels | 4-6,5-7 |
| ITF Netherlands F5 | 2017/08/15 08:00 | Van Terheijden, Tim v Louis Wessels | 6-2,7-6 |
| ATP Hamburg Qual | 2017/07/22 13:50 | Louis Wessels v Mayer, Leonardo | 3-6,2-6 |
| Germany F8, Singles | 2017/07/19 10:00 | Louis Wessels v Moraing, Mats | 1-6,6-3,2-6 |
| Braunchsweig, Germany | 2017/07/11 09:00 | Louis Wessels v Oscar Otte | 1-6,4-6 |
| ITF Germany F6 | 2017/07/05 13:15 | Louis Wessels v Tim Ruehl | 3-6,4-6 |
| ITF Germany F5 | 2017/07/01 14:35 | Louis Wessels v Antoine Hoang | 1-6,5-7 |