Stadium: Court 3 Round: 54
| Challenger Lille Qual | 2018/03/18 15:20 | Laurynas Grigelis v Emil Ruusuvuori | 7-6,2-6,6-3 |
| Challenger Lille Qual | 2018/03/17 15:55 | Laurynas Grigelis v Charles Bertimon | 6-2,6-4 |
| ITF Tunisia F9 | 2018/03/09 09:00 | Laurynas Grigelis v Jonathan Kanar | 5-7,1-6 |
| ITF Tunisia F9 | 2018/03/08 10:45 | Laurynas Grigelis v Diego Hidalgo | 7-6,6-2 |
| ITF Tunisia F9 | 2018/03/07 09:00 | Laurynas Grigelis v Conor Berg | 6-3,6-2 |
| ITF Italy F1 | 2018/03/04 09:00 | Maximilian Neuchrist v Laurynas Grigelis | 4-6,4-6 |
| ITF Italy F1 | 2018/03/03 14:40 | Laurynas Grigelis v Remi Boutillier | 6-3,6-1 |
| ITF Italy F1 | 2018/03/02 17:10 | Gregoire Barrere v Laurynas Grigelis | 3-6,4-6 |
| Challenger Lille Qual | 2018/03/18 15:55 | Guillermo Olaso v Daniel Masur | 4-6,7-5,6-2 |
| Challenger Lille Qual | 2018/03/17 12:20 | Moez Echargui v Guillermo Olaso | 2-6,6-7 |
| ITF Egypt F8 | 2018/03/09 08:00 | Dejan Katic v Guillermo Olaso | 6-4,6-2 |
| ITF Egypt F8 | 2018/03/08 08:00 | Patrik Nema v Guillermo Olaso | 2-6,3-6 |
| ITF Egypt F8 | 2018/03/06 08:00 | Louis Wessels v Guillermo Olaso | 2-6,6-3,6-7 |
| Challenger San Francisco Qual | 2018/02/04 21:00 | Guillermo Olaso v Jack Molloy | 7-5,6-2 |
| Challenger San Francisco Qual | 2018/02/03 21:55 | Guillermo Olaso v Jacob Brumm | 6-3,6-1 |
| Challenger Dallas Qual | 2018/01/29 18:15 | Evgeny Karlovskiy v Guillermo Olaso | 6-7,6-1,7-6 |