Round: 62 Ground: Clay
| ITF Belgium F1 | 2017/06/22 16:00 | Clement Geens v Nico Mertens | 7-5,6-4 |
| ITF Belgium F1 | 2017/06/20 14:10 | Nico Mertens v Antoine Damiens | 7-5,6-4 |
| ITF Belgium F1 Qual | 2017/06/19 10:20 | Nico Mertens v Buvaysar Gadamauri | 6-1,7-6 |
| ITF Belgium F1 Qual | 2017/06/18 13:10 | Alessandro Ricci v Nico Mertens | 1-6,1-6 |
| ITF Belgium F1 Qual | 2017/06/17 14:20 | Nico Mertens v Maxime Vandendooren | 6-2,6-2 |
| ITF Germany F5 | 2015/06/29 11:00 | David Simunek v Nico Mertens | 6-1,6-1 |
| ITF Germany F5 | 2015/06/28 08:00 | Nico Mertens v Oliver Mrose | 7-5,6-4 |
| ITF Germany F5 | 2015/06/28 08:00 | Nico Mertens v Hendrik Maier | 6-4,6-0 |
| ITF Germany F7 | 2017/07/09 08:00 | James Markiewicz v Felipe Garla | 4-6,5-7 |
| ITF Germany F4 | 2017/06/17 08:00 | James Markiewicz v Delf Gohlke | 6-4,2-6,7-5 |
| ITF Czech Republic F3 Qual | 2017/05/28 09:30 | Riccardo Maiga v James Markiewicz | 6-4,6-1 |
| ITF Czech Republic F3 Qual | 2017/05/27 11:00 | James Markiewicz v Noe Sytkow | 6-2,6-1 |
| ITF Czech Republic F1 Qual | 2017/05/14 08:00 | Maciej Rajski v James Markiewicz | 6-4,6-4 |
| ITF Czech Republic F1 Qual | 2017/05/13 11:30 | James Markiewicz v Denis Merkulov | 6-4,6-2 |
| ITF Indonesia F5 | 2016/11/26 07:00 | Alexander Pavlioutchenkov v James Markiewicz | 4-6,7-6,6-2 |
| ITF Turkey F47 Qual | 2016/11/19 06:00 | James Markiewicz v Michal Kominek | 6-3,6-1 |