Stadium: Court 4 Round: 25
| ITF Lebanon F1 | 2018/09/26 14:35 | Olaso, Guillermo v Pospisil, Jaroslav | 6-1,6-1 |
| ITF Lebanon F1 | 2018/09/29 13:00 | Alexandre Muller v Olaso, Guillermo | 4-6,6-3,6-0 |
| ITF Lebanon F1 | 2018/09/28 13:00 | Olaso, Guillermo v Eremin, Edoardo | 6-1,6-4 |
| ITF Lebanon F1 | 2018/09/27 13:00 | Olaso, Guillermo v Ibrahim, Hasan | 6-2,6-4 |
| ITF Lebanon F1 | 2018/09/26 14:35 | Olaso, Guillermo v Pospisil, Jaroslav | 6-1,6-1 |
| Germany F8, Singles | 2018/07/19 11:35 | Orlando Luz v Olaso, Guillermo | 7-6,6-0 |
| Germany F8, Singles | 2018/07/18 11:25 | Lucas Gerch v Olaso, Guillermo | 2-6,3-6 |
| ITF Spain F16 | 2018/06/27 18:45 | Hoyt, Evan v Olaso, Guillermo | 4-6,6-2,6-4 |
| ITF Spain F16 | 2018/06/26 19:40 | Cembellin Prieto, Antonio v Olaso, Guillermo | 3-6,3-6 |
| ITF Lebanon F1 | 2018/09/26 14:35 | Olaso, Guillermo v Pospisil, Jaroslav | 6-1,6-1 |
| ITF Serbia F4 | 2018/08/31 09:00 | Paroulek, Tadeas v Pospisil, Jaroslav | 6-4,6-1 |
| ITF Serbia F4 | 2018/08/30 09:00 | Bucan, Aleksa v Pospisil, Jaroslav | 3-6,1-6 |
| ITF Serbia F4 | 2018/08/28 08:00 | Petrovic, Stefan v Pospisil, Jaroslav | 5-7,0-6 |
| Challenger Prostejov Qual | 2018/06/03 14:15 | Pospisil, Jaroslav v Gianluca Mager | 6-4,1-6,5-7 |
| Challenger Prostejov Qual | 2018/06/03 08:00 | Pospisil, Jaroslav v Dominik Kellovsky | 6-3,6-4 |
| Turkey F14, Singles Qualifying | 2018/04/15 07:30 | Nino Serdarusic v Pospisil, Jaroslav | 6-2,2-6,6-3 |
| Turkey F14, Singles Qualifying | 2018/04/14 07:30 | Pospisil, Jaroslav v Sebastian Baez | 6-3,6-4 |