Stadium: Court 3 Round: 26 Ground: Clay
| ITF Netherlands F4 | 2018/08/15 08:00 | Mantilla, Felipe v Merino, Alexander | 6-1,6-3 |
| Challenger Braunschweig Qual | 2018/07/07 11:20 | Maxime Janvier v Mantilla, Felipe | 6-2,6-2 |
| Challenger Braunschweig Qual | 2018/07/07 07:30 | Matthew Dellavedova v Mantilla, Felipe | 2-6,2-6 |
| Challenger Marburg Qual | 2018/06/30 16:40 | Mantilla, Felipe v Rodriguez, Cristian | 3-6,2-6 |
| ITF USA F15 | 2018/06/19 16:05 | Marcos Giron v Mantilla, Felipe | 6-1,7-6 |
| ITF USA F13 | 2018/06/14 18:00 | Shi, Brian v Mantilla, Felipe | 6-4,2-6,6-4 |
| ITF USA F13 | 2018/06/13 16:05 | Mantilla, Felipe v Aragone, JC | 6-3,6-7,7-6 |
| ITF Mexico F2 | 2018/05/15 22:30 | Mantilla, Felipe v Lopez Villasenor, Gerardo | 6-4,5-7,6-7 |
| ITF Netherlands F4 | 2018/08/15 08:00 | Ryan Nijboer v Roumane, Rayane | 7-6,5-7,6-4 |
| ITF Belgium F7 | 2018/08/07 10:35 | Ryan Nijboer v Zukas, Matias | 3-6,1-6 |
| ITF Belgium F6 | 2018/07/31 09:00 | Maxime Chazal v Ryan Nijboer | 6-3,7-6 |
| Challenger Scheveningen Qual | 2018/07/14 08:00 | Elliot Benchetrit v Ryan Nijboer | 6-3,6-4 |
| ITF Netherlands F3 | 2018/07/11 11:50 | Bangoura, Sekou v Ryan Nijboer | 7-5,6-1 |
| ITF Netherlands F3 | 2018/07/10 09:30 | Ryan Nijboer v van Den Berg, Bart | 6-4,7-5 |
| ITF Netherlands F2 | 2018/07/06 13:30 | Ryan Nijboer v Zhurbin, Alexander | 1-6,3-6 |
| ITF Netherlands F2 | 2018/07/05 17:45 | Orlando Luz v Ryan Nijboer | 2-6,4-6 |