Stadium: Centre Court 14 Round: 25 Ground: Clay
| ITF Spain F9 | 2018/04/17 09:25 | Olaso, Guillermo v Bossel, Adrien | 6-2,6-4 |
| ITF Spain F9 | 2018/04/19 14:00 | Olaso, Guillermo v Steven Diez | 7-6,1-6,5-7 |
| ITF Spain F9 | 2018/04/17 09:25 | Olaso, Guillermo v Bossel, Adrien | 6-2,6-4 |
| Challenger Alicante Qual | 2018/03/31 09:55 | Gomez-Herrera, Carlos v Olaso, Guillermo | 2-6,7-6,7-5 |
| 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 |
| ITF Spain F10 Qual | 2018/04/23 11:20 | Bossel, Adrien v Benjamin Winter Lopez | 6-4,6-2 |
| ITF Spain F10 Qual | 2018/04/22 14:00 | Bossel, Adrien v Lipka, Dariusz | 7-6,6-3 |
| ITF Spain F10 Qual | 2018/04/21 15:30 | Bossel, Adrien v Barranco, Sergio | 6-3,6-2 |
| ITF Spain F9 | 2018/04/17 09:25 | Olaso, Guillermo v Bossel, Adrien | 6-2,6-4 |
| ITF Portugal F6 | 2018/03/27 13:40 | Ortega-Olmedo, Roberto v Bossel, Adrien | 6-7,6-3,6-3 |
| ITF Portugal F6 Qual | 2018/03/26 10:00 | Bossel, Adrien v Teixeira, Duarte Nuno | 6-1,6-3 |
| ITF Portugal F6 Qual | 2018/03/25 09:00 | Bossel, Adrien v Paschetto, Francesco | 6-2,7-5 |
| ITF Portugal F5 | 2018/03/20 11:35 | Bossel, Adrien v Neuchrist, Maximilian | 5-7,2-6 |