Stadium: Court 4 Round: 26 Ground: Clay
| ITF Germany F8 | 2018/07/18 16:10 | Orlando Luz v Tim Seibert | 4-6,6-1,6-3 |
| ITF Netherlands F3 | 2018/07/14 13:05 | Tim Van Rijthoven v Orlando Luz | 6-2,7-6 |
| ITF Netherlands F3 | 2018/07/13 10:00 | Orlando Luz v Emil Ruusuvuori | 1-6,6-3,7-6 |
| ITF Netherlands F3 | 2018/07/11 15:05 | Orlando Luz v Luca Gelhardt | 6-2,6-2 |
| ITF Netherlands F3 | 2018/07/10 12:15 | Orlando Luz v Filippo Moroni | 6-1,6-1 |
| ITF Netherlands F2 | 2018/07/05 17:45 | Orlando Luz v Ryan Nijboer | 2-6,4-6 |
| ITF Netherlands F2 | 2018/07/03 10:10 | Orlando Luz v Niels Lootsma | 1-6,6-3,6-4 |
| ITF Romania F2 | 2018/06/01 09:00 | Orlando Luz v Jules Okala | 6-7,3-6 |
| ITF Germany F8 | 2018/07/18 11:25 | Lucas Gerch v Guillermo Olaso | 2-6,3-6 |
| ITF Spain F16 | 2018/06/27 18:45 | Evan Hoyt v Guillermo Olaso | 4-6,6-2,6-4 |
| ITF Spain F16 | 2018/06/26 19:40 | Antonio Cembellin Prieto v Guillermo Olaso | 3-6,3-6 |
| ITF France F10 | 2018/06/19 11:15 | Guillermo Olaso v Eduard Guell | 4-6,6-3,7-6 |
| Challenger Poznan Qual | 2018/06/04 13:30 | Jeremy Jahn v Guillermo Olaso | 6-7,6-1,6-2 |
| Challenger Poznan Qual | 2018/06/04 08:00 | Ronald Slobodchikov v Guillermo Olaso | 4-6,6-3,1-6 |
| Challenger Poznan Qual | 2018/06/03 09:25 | Juan Pablo Ficovich v Guillermo Olaso | 4-6,2-6 |
| Challenger Busan Qual | 2018/05/14 02:00 | Rubin Statham v Guillermo Olaso | 6-4,6-2 |