Stadium: Court 2 Round: 46 Ground: Clay
| Challenger Poznan Qual | 2018/06/03 08:00 | Riccardo Bonadio v Ronald Slobodchikov | 3-6,4-6 |
| ITF Egypt F17 | 2018/05/12 07:30 | Orlando Luz v Ronald Slobodchikov | 6-7,6-2,6-1 |
| ITF Egypt F17 | 2018/05/11 09:35 | Neven Krivokuca v Ronald Slobodchikov | 3-6,5-7 |
| ITF Egypt F17 | 2018/05/10 09:05 | Niels Lootsma v Ronald Slobodchikov | 6-2,6-7,2-6 |
| ITF Egypt F17 | 2018/05/09 09:25 | Alberto Cammarata v Ronald Slobodchikov | 2-6,6-7 |
| ITF Egypt F16 | 2018/05/06 09:00 | Ronald Slobodchikov v Jordan Correia | 2-6,4-6 |
| ITF Egypt F16 | 2018/05/05 07:30 | Marco Bortolotti v Ronald Slobodchikov | 5-7,7-5,3-6 |
| ITF Egypt F16 | 2018/05/04 07:30 | Ronald Slobodchikov v Duje Kekez | 6-3,3-6,6-3 |
| 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 |
| Challenger Busan Qual | 2018/05/12 01:00 | Jae Hwan Kim v Guillermo Olaso | 0-6,5-7 |
| Challenger Glasgow | 2018/05/04 09:30 | Lukas Lacko v Guillermo Olaso | 6-2,6-3 |
| Challenger Glasgow | 2018/05/02 13:50 | Guillermo Olaso v Lloyd Glasspool | 6-4,6-3 |
| Challenger Glasgow | 2018/04/30 11:15 | Evgeny Karlovskiy v Guillermo Olaso | 6-7,3-6 |
| ITF Spain F9 | 2018/04/19 14:00 | Guillermo Olaso v Steven Diez | 7-6,1-6,5-7 |