Stadium: Court 1 Round: 28
| ITF Tunisia F32 | 2017/10/29 08:30 | Guillermo Olaso v Alexandre Muller | 6-4,3-6,3-6 |
| Challenger Scheveningen Qual | 2018/07/14 11:40 | Alexandre Muller v Tak Khunn Wang | 5-7,4-6 |
| Challenger Blois | 2018/06/19 14:15 | Roberto Marcora v Alexandre Muller | 6-1,6-3 |
| Challenger Lyon | 2018/06/15 15:05 | Alexandre Muller v Felix Auger Aliassime | 3-6,1-6 |
| Challenger Lyon | 2018/06/13 12:35 | Alexandre Muller v Joao Domingues | 2-6,7-5,6-4 |
| Challenger Lyon | 2018/06/11 12:30 | Pedro Sousa v Alexandre Muller | 5-7,3-6 |
| French Open Qual | 2018/05/25 08:00 | Casper Ruud v Alexandre Muller | 6-1,6-3 |
| French Open Qual | 2018/05/23 15:05 | Akira Santillan v Alexandre Muller | 1-6,6-3,0-6 |
| French Open Qual | 2018/05/21 08:00 | Alexandre Muller v Donald Young | 7-6,6-3 |
| 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 Bartrina | 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 |
| Challenger Busan Qual | 2018/05/13 02:00 | Thomas Fancutt v Guillermo Olaso | 1-6,5-7 |