Stadium: P Round: 45
| Challenger Marbella Qual | 2018/03/24 16:30 | Gomez-Herrera, Carlos v Lukas Rosol | 6-7,3-6 |
| Challenger - Santiago | 2018/03/10 22:00 | Gomez-Herrera, Carlos v Marco Cecchinato | 6-1,1-6,1-6 |
| Challenger - Santiago | 2018/03/09 20:15 | Jozef Kovalik v Gomez-Herrera, Carlos | 3-6,6-7 |
| Challenger - Santiago | 2018/03/08 19:45 | Dutra Silva, Rogerio v Gomez-Herrera, Carlos | 6-4,3-6,3-6 |
| Challenger - Santiago | 2018/03/07 15:00 | Facundo Bagnis v Gomez-Herrera, Carlos | 1-6,3-6 |
| Challenger - Santiago | 2018/03/06 17:50 | Souza, Joao Olavo v Gomez-Herrera, Carlos | 3-6,1-6 |
| Challenger Santiago Qual | 2018/03/05 14:00 | Gomez-Herrera, Carlos v Londero, Juan Ignacio | 6-2,6-4 |
| Challenger Santiago Qual | 2018/03/04 14:00 | Hugo Dellien v Gomez-Herrera, Carlos | 1-6,5-7 |
| Challenger Marbella Qual | 2018/03/24 19:25 | Federico Gaio v Olaso, Guillermo | 7-5,7-6 |
| Challenger - Lille | 2018/03/23 19:00 | Olaso, Guillermo v Gregoire Barrere | 0-6,1-6 |
| Challenger - Lille | 2018/03/21 18:00 | Mahut, Nicolas v Olaso, Guillermo | 6-7,7-6,3-6 |
| Challenger - Lille | 2018/03/20 18:05 | Olaso, Guillermo v Mertens, Yannick | 5-7,6-1,6-3 |
| Challenger Lille Qual | 2018/03/19 12:30 | Grigelis, Laurynas v Olaso, Guillermo | 1-6,2-6 |
| Challenger Lille Qual | 2018/03/18 15:55 | Olaso, Guillermo v Daniel Masur | 4-6,7-5,6-2 |
| Challenger Lille Qual | 2018/03/17 12:20 | Moez Echargui v Olaso, Guillermo | 2-6,6-7 |
| ITF Egypt F8 | 2018/03/09 08:00 | Katic, Dejan v Olaso, Guillermo | 6-4,6-2 |