Round: 25 Ground: Clay
| ATP Munich Qual | 2017/04/30 09:00 | Yannick Mertens v Guido Pella | 3-6,4-6 |
| ATP Munich Qual | 2017/04/29 10:00 | Alexander Bublik v Yannick Mertens | 1-6,3-6 |
| ITF USA F13 | 2017/04/14 22:25 | Yannick Mertens v Eric Quigley | 6-2,3-6,4-6 |
| ITF USA F13 | 2017/04/13 17:00 | Yannick Mertens v Yibing Wu | 6-3,6-1 |
| ITF USA F12 | 2017/04/05 19:00 | Jan Choinski v Yannick Mertens | 4-6,6-4,6-1 |
| ITF Portugal F4 | 2017/04/01 09:30 | Yannick Mertens v Hubert Hurkacz | 6-7,4-6 |
| ITF Portugal F4 | 2017/03/31 11:20 | Yannick Mertens v Fred Gil | 6-3,6-2 |
| ITF Portugal F4 | 2017/03/30 12:05 | Yannick Mertens v Goncalo Falcao | 6-4,6-3 |
| ITF USA F15 | 2017/04/27 17:00 | Lukas Ollert v Ricardo Rodriguez-Pace | 6-4,3-6,4-6 |
| ITF USA F15 | 2017/04/25 15:00 | Lukas Ollert v Naoki Nakagawa | 7-6,6-3 |
| ITF USA F14 | 2017/04/20 16:50 | Felipe Mantilla v Lukas Ollert | 7-6,6-2 |
| ITF USA F14 | 2017/04/18 14:00 | Lukas Ollert v Yosuke Watanuki | 6-4,7-6 |
| ITF Egypt F9 | 2017/03/17 08:00 | Aldin Setkic v Lukas Ollert | 6-2,6-7,6-1 |
| ITF Egypt F9 | 2017/03/16 08:00 | Lukas Ollert v Federico Zeballos | 6-0,6-4 |
| ITF Egypt F9 | 2017/03/15 10:50 | Rudolf Molleker v Lukas Ollert | 6-3,6-7,5-7 |
| ITF Egypt F8 | 2017/03/09 08:00 | Aldin Setkic v Lukas Ollert | 6-3,6-2 |