Stadium: C Round: 28
| ITF Portugal F11 | 2016/09/28 13:35 | Yannick Mertens v Joao Monteiro | 6-3,6-4 |
| ITF Portugal F20 | 2017/09/27 13:00 | Joao Monteiro v Andres Artunedo Martinavarr | 7-5,7-5 |
| ITF Portugal F20 | 2017/09/26 14:40 | Joao Monteiro v Szymon Walkow | 6-3,6-2 |
| ITF Portugal F19 | 2017/09/23 11:20 | Joao Monteiro v Fred Gil | 4-6,2-6 |
| ITF Portugal F19 | 2017/09/22 13:45 | Joao Monteiro v Darko Jandric | 6-1,6-2 |
| ITF Portugal F19 | 2017/09/21 10:00 | Joao Monteiro v Hugo Voljacques | 6-3,7-6 |
| Challenger Alphen | 2017/09/06 10:00 | Joao Monteiro v Mats Moraing | 3-6,0-6 |
| ITF Portugal F18 | 2017/08/31 12:30 | Andres Artunedo Martinavarr v Joao Monteiro | 3-6,6-3,6-4 |
| ITF Portugal F18 | 2017/08/30 13:00 | Daniel Rodrigues v Joao Monteiro | 1-6,1-6 |
| ITF Portugal F20 | 2017/09/28 12:10 | Daniel Masur v Yannick Mertens | 2-6,6-7 |
| ITF Portugal F20 | 2017/09/27 11:25 | Hubert Hurkacz v Yannick Mertens | 4-6,1-6 |
| ITF Portugal F20 | 2017/09/26 09:00 | Jonathan Kanar v Yannick Mertens | 3-6,0-6 |
| ATP Metz Qual | 2017/09/18 11:30 | Peter Gojowczyk v Yannick Mertens | 6-3,6-4 |
| ATP Metz Qual | 2017/09/17 13:50 | Yannick Mertens v Calvin Hemery | 7-5,6-1 |
| Challenger Istanbul | 2017/09/12 11:15 | Mirza Basic v Yannick Mertens | 3-6,6-3,7-5 |
| Challenger Istanbul Qual | 2017/09/10 08:00 | Yannick Mertens v Shalva Dzhanashia | 6-1,6-2 |
| Challenger Istanbul Qual | 2017/09/09 09:25 | Yannick Mertens v Artem Strokan | 6-0,6-0 |