| Challenger Segovia Qual | 2018/07/30 10:30 | Yannick Jankovits v Nicolas Alvarez Varona | 7-6,6-1 |
| Challenger Segovia Qual | 2018/07/29 09:00 | Nicolas Alvarez Varona v Viktor Durasovic | 6-3,7-6 |
| Challenger Segovia Qual | 2018/07/28 11:00 | Diego Hidalgo v Nicolas Alvarez Varona | 3-6,4-6 |
| ITF Spain F12 | 2018/05/24 09:00 | Nicolas Alvarez Varona v Sergio Martos Gornes | 4-6,6-7 |
| ITF Spain F12 | 2018/05/23 10:40 | Nicolas Alvarez Varona v Jordi Mas De Ugarte | 6-2,6-2 |
| ATP Madrid Qual | 2018/05/05 16:35 | Nicolas Alvarez Varona v Mirza Basic | 6-3,6-7,2-6 |
| ITF Spain F9 | 2018/04/19 09:00 | Patricio Heras v Nicolas Alvarez Varona | 6-7,6-3,6-2 |
| ITF Spain F9 | 2018/04/18 13:40 | Jordan Correia v Nicolas Alvarez Varona | 5-7,5-7 |
| ITF Portugal F14 | 2018/08/05 07:00 | Illia Stoliar v Eduardo Morais | 5-7,3-6 |
| ITF Portugal F14 | 2018/08/04 10:00 | Illia Stoliar v Bernardo A P E Oliveira | 4-6,6-4,7-5 |
| ITF Portugal F13 | 2018/07/28 08:30 | Illia Stoliar v Egill Sigurdsson | 2-6,0-6 |
| ITF Portugal F11 Qual | 2018/06/30 08:30 | Illia Stoliar v Henrique Brancal | 6-4,3-6,6-7 |
| ITF Portugal F10 | 2018/06/24 12:00 | Alexander Donski v Illia Stoliar | 6-2,6-4 |
| ITF Portugal F10 | 2018/06/23 12:00 | Danail Banov v Illia Stoliar | 4-6,4-6 |
| ITF Portugal F6 Qual | 2018/03/25 09:00 | Sebastien Boltz v Illia Stoliar | 6-1,6-0 |
| ITF Portugal F2 Qual | 2018/02/25 13:00 | Diego A B Sanchez v Illia Stoliar | 6-2,6-2 |