Stadium: Center Court Round: 25 Ground: Clay
| Segovia, Spain | 2017/08/01 08:00 | Goncalo Oliveira v Mertens, Yannick | 6-3,3-6,6-4 |
| ATP Gstaad Qual | 2017/07/22 10:10 | Mertens, Yannick v Gleb Sakharov | 4-6,5-7 |
| Challenger Scheveningen | 2017/07/18 11:40 | Botic Van De Zandschulp v Mertens, Yannick | 4-6,6-3,6-2 |
| ITF France F15 | 2017/07/10 18:00 | Mertens, Yannick v Eremin, Edoardo | 5-7,2-6 |
| Challenger Recanati | 2017/07/05 15:30 | Mertens, Yannick v Quentin Halys | 1-6,4-6 |
| Challenger Recanati | 2017/07/04 08:30 | Mertens, Yannick v Dmitry Popko | 3-6,6-3,7-6 |
| ATP Antalya Qual | 2017/06/25 10:10 | Ramkumar Ramanathan v Mertens, Yannick | 6-3,6-4 |
| ATP Antalya Qual | 2017/06/24 10:50 | Altug Celikbilek v Mertens, Yannick | 2-6,4-6 |
| ITF Estonia F1 | 2017/07/29 09:00 | Zopp, Jurgen v von Massow, George | 6-1,6-3 |
| ITF Estonia F1 | 2017/07/28 15:50 | Matias Franco Descotte v von Massow, George | 3-6,1-6 |
| ITF Estonia F1 | 2017/07/27 08:00 | von Massow, George v Fawcett, Tom | 6-3,6-2 |
| ITF Estonia F1 | 2017/07/26 08:00 | von Massow, George v Volfson, David | 6-0,7-6 |
| ITF Estonia F1 | 2017/07/25 08:00 | von Massow, George v Numajiri, Keisuke | 6-2,6-2 |
| Challenger Scheveningen | 2017/07/17 12:00 | von Massow, George v Stakhovsky, Sergiy | 6-7,2-6 |
| Challenger Scheveningen Qual | 2017/07/16 13:30 | de Valk, Roy Sarut v von Massow, George | 3-6,2-6 |
| Challenger Scheveningen Qual | 2017/07/15 09:25 | Alekseenko, Vadim v von Massow, George | 0-6,1-6 |