Stadium: Cancha 2 Round: 45 Ground: Clay
| Challenger Lima | 2018/10/20 16:45 | Malla, Bastian v Mantilla, Felipe | 6-2,6-4 |
| Santo Domingo, Dominican Republic | 2018/10/07 18:25 | Mantilla, Felipe v Federico Coria | 5-7,6-7 |
| Santo Domingo, Dominican Republic | 2018/10/06 17:20 | Segarelli, Emilio Andrea v Mantilla, Felipe | 3-6,1-6 |
| Monterrey, Mexico | 2018/09/29 17:35 | Mantilla, Felipe v Harrison Adams | 2-6,5-7 |
| ITF Netherlands F6 | 2018/08/31 09:00 | Kocevar-Desman, Tom v Mantilla, Felipe | 3-6,7-6,6-4 |
| ITF Netherlands F6 | 2018/08/30 08:00 | Veldheer, Mick v Mantilla, Felipe | 3-6,1-6 |
| ITF Netherlands F6 | 2018/08/29 11:00 | Richmond, John Harrison v Mantilla, Felipe | 3-6,1-6 |
| ITF Netherlands F5 | 2018/08/20 08:00 | von Massow, George v Mantilla, Felipe | 6-4,7-6 |
| Challenger Campinas Qual | 2018/09/30 14:55 | Neis, Fabricio v Fernando Yamacita | 7-5,6-4 |
| Challenger Campinas Qual | 2018/09/29 14:15 | Orlando Luz v Neis, Fabricio | 6-3,5-7,2-6 |
| Challenger Biella Qual | 2018/09/16 14:00 | Tomas Barrios Vera v Neis, Fabricio | 7-5,6-0 |
| Challenger Biella Qual | 2018/09/15 14:40 | Zorzi, Sebastiano Mahoro v Neis, Fabricio | 2-6,2-6 |
| Challenger Lisbon Qual | 2018/05/13 13:10 | Neis, Fabricio v Satral, Jan | 7-6,3-6,1-6 |
| Challenger Rio De Janeiro | 2017/11/22 16:45 | Neis, Fabricio v Oliveira, Cristian | 6-2,2-6,6-3 |
| Challenger Rio De Janeiro Qual | 2017/11/19 13:00 | Nagy, Peter v Neis, Fabricio | 6-3,6-7,6-7 |
| Challenger Santiago 2 Qual | 2017/11/11 18:00 | Dimitar Kuzmanov v Neis, Fabricio | 7-6,7-5 |